20101112120100 has 144 divisors (see below), whose sum is σ = 63530909761536. Its totient is φ = 4866507600000.

The previous prime is 20101112120099. The next prime is 20101112120227. The reversal of 20101112120100 is 102121110102.

It is a super-2 number, since 2×20101112120100² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1577124 + ... + 6533723.

It is an arithmetic number, because the mean of its divisors is an integer number (441186873344).

Almost surely, 2^{20101112120100} is an apocalyptic number.

20101112120100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20101112120100 is an abundant number, since it is smaller than the sum of its proper divisors (43429797641436).

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

20101112120100 is a wasteful number, since it uses less digits than its factorization.

20101112120100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8111626 (or 8111619 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 20101112120100 its reverse (102121110102), we get a palindrome (20203233230202).

The spelling of 20101112120100 in words is "twenty trillion, one hundred one billion, one hundred twelve million, one hundred twenty thousand, one hundred".