20111222101 has 8 divisors (see below), whose sum is σ = 20151905024. Its totient is φ = 20070581760.

The previous prime is 20111222083. The next prime is 20111222107. The reversal of 20111222101 is 10122211102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20111222101 - 2²¹ = 20109124949 is a prime.

It is a super-2 number, since 2×20111222101² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20111222107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1036156 + ... + 1055386.

It is an arithmetic number, because the mean of its divisors is an integer number (2518988128).

Almost surely, 2^20111222101 is an apocalyptic number.

It is an amenable number.

20111222101 is a deficient number, since it is larger than the sum of its proper divisors (40682923).

20111222101 is a wasteful number, since it uses less digits than its factorization.

20111222101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21291.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 20111222101 its reverse (10122211102), we get a palindrome (30233433203).

The spelling of 20111222101 in words is "twenty billion, one hundred eleven million, two hundred twenty-two thousand, one hundred one".