20112212220101 has 8 divisors (see below), whose sum is σ = 20125120180440. Its totient is φ = 20099306852352.

The previous prime is 20112212220049. The next prime is 20112212220103. The reversal of 20112212220101 is 10102221221102.

It can be written as a sum of positive squares in 4 ways, for example, as 2266876528225 + 17845335691876 = 1505615^2 + 4224374^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20112212220101 is a prime.

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 20112212220101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20112212220103) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14992901 + ... + 16279173.

It is an arithmetic number, because the mean of its divisors is an integer number (2515640022555).

Almost surely, 2^{20112212220101} is an apocalyptic number.

It is an amenable number.

20112212220101 is a deficient number, since it is larger than the sum of its proper divisors (12907960339).

20112212220101 is a wasteful number, since it uses less digits than its factorization.

20112212220101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1296295.

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

Adding to 20112212220101 its reverse (10102221221102), we get a palindrome (30214433441203).

The spelling of 20112212220101 in words is "twenty trillion, one hundred twelve billion, two hundred twelve million, two hundred twenty thousand, one hundred one".