20110122100 has 36 divisors (see below), whose sum is σ = 43739841964. Its totient is φ = 8025454080.

The previous prime is 20110122089. The next prime is 20110122119. The reversal of 20110122100 is 122101102.

It can be written as a sum of positive squares in 6 ways, for example, as 1747684 + 20108374416 = 1322^2 + 141804^2 .

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 188919 + ... + 275518.

Almost surely, 2^20110122100 is an apocalyptic number.

20110122100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20110122100 is an abundant number, since it is smaller than the sum of its proper divisors (23629719864).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20110122100 is a wasteful number, since it uses less digits than its factorization.

20110122100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 464884 (or 464877 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 20110122100 its reverse (122101102), we get a palindrome (20232223202).

The spelling of 20110122100 in words is "twenty billion, one hundred ten million, one hundred twenty-two thousand, one hundred".