20121101122110 has 32 divisors (see below), whose sum is σ = 50390235855360. Its totient is φ = 5132338836768.

The previous prime is 20121101122097. The next prime is 20121101122127. The reversal of 20121101122110 is 1122110112102.

It is a happy number.

It is a super-2 number, since 2×20121101122110² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 20121101122110.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14580507370 + ... + 14580508749.

It is an arithmetic number, because the mean of its divisors is an integer number (1574694870480).

Almost surely, 2^{20121101122110} is an apocalyptic number.

20121101122110 is an abundant number, since it is smaller than the sum of its proper divisors (30269134733250).

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

20121101122110 is a wasteful number, since it uses less digits than its factorization.

20121101122110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29161016152.

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

Adding to 20121101122110 its reverse (1122110112102), we get a palindrome (21243211234212).

The spelling of 20121101122110 in words is "twenty trillion, one hundred twenty-one billion, one hundred one million, one hundred twenty-two thousand, one hundred ten".