20122221201101 has 4 divisors (see below), whose sum is σ = 21305881271772. Its totient is φ = 18938561130432.

The previous prime is 20122221201037. The next prime is 20122221201109. The reversal of 20122221201101 is 10110212222102.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8886659102500 + 11235562098601 = 2981050^2 + 3351949^2 .

It is a cyclic number.

It is not a de Polignac number, because 20122221201101 - 2⁶ = 20122221201037 is a prime.

It is a super-2 number, since 2×20122221201101² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (17), and also a Moran number because the ratio is a prime number: 1183660070653 = 20122221201101 / (2 + 0 + 1 + 2 + 2 + 2 + 2 + 1 + 2 + 0 + 1 + 1 + 0 + 1).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20122221201101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20122221201109) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 591830035310 + ... + 591830035343.

It is an arithmetic number, because the mean of its divisors is an integer number (5326470317943).

Almost surely, 2^{20122221201101} is an apocalyptic number.

It is an amenable number.

20122221201101 is a deficient number, since it is larger than the sum of its proper divisors (1183660070671).

20122221201101 is a wasteful number, since it uses less digits than its factorization.

20122221201101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1183660070670.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 20122221201101 its reverse (10110212222102), we get a palindrome (30232433423203).

The spelling of 20122221201101 in words is "twenty trillion, one hundred twenty-two billion, two hundred twenty-one million, two hundred one thousand, one hundred one".