20110102100100 has 144 divisors (see below), whose sum is σ = 64652567595840. Its totient is φ = 5362501996800.

The previous prime is 20110102100087. The next prime is 20110102100107. The reversal of 20110102100100 is 100120101102.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (20110102100107) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 85529299 + ... + 85764101.

It is an arithmetic number, because the mean of its divisors is an integer number (448976163860).

Almost surely, 2^{20110102100100} is an apocalyptic number.

20110102100100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20110102100100 is an abundant number, since it is smaller than the sum of its proper divisors (44542465495740).

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

20110102100100 is a wasteful number, since it uses less digits than its factorization.

20110102100100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266547 (or 266534 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 20110102100100 its reverse (100120101102), we get a palindrome (20210222201202).

The spelling of 20110102100100 in words is "twenty trillion, one hundred ten billion, one hundred two million, one hundred thousand, one hundred".