20110122111021 has 32 divisors (see below), whose sum is σ = 26981751283200. Its totient is φ = 13322869862400.

The previous prime is 20110122110999. The next prime is 20110122111031. The reversal of 20110122111021 is 12011122101102.

It is a happy number.

It is not a de Polignac number, because 20110122111021 - 2⁷ = 20110122110893 is a prime.

It is a super-2 number, since 2×20110122111021² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20110122111031) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1704097321 + ... + 1704109121.

It is an arithmetic number, because the mean of its divisors is an integer number (843179727600).

Almost surely, 2^{20110122111021} is an apocalyptic number.

It is an amenable number.

20110122111021 is a deficient number, since it is larger than the sum of its proper divisors (6871629172179).

20110122111021 is a wasteful number, since it uses less digits than its factorization.

20110122111021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16789.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 20110122111021 its reverse (12011122101102), we get a palindrome (32121244212123).

The spelling of 20110122111021 in words is "twenty trillion, one hundred ten billion, one hundred twenty-two million, one hundred eleven thousand, twenty-one".