100121020111100 has 72 divisors (see below), whose sum is σ = 217707310840320. Its totient is φ = 39966445586880.

The previous prime is 100121020111039. The next prime is 100121020111117. The reversal of 100121020111100 is 1111020121001.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1043324921 + ... + 1043420879.

It is an arithmetic number, because the mean of its divisors is an integer number (3023712650560).

Almost surely, 2^{100121020111100} is an apocalyptic number.

100121020111100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100121020111100 is an abundant number, since it is smaller than the sum of its proper divisors (117586290729220).

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

100121020111100 is a wasteful number, since it uses less digits than its factorization.

100121020111100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117219 (or 117212 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 100121020111100 its reverse (1111020121001), we get a palindrome (101232040232101).

Subtracting from 100121020111100 its reverse (1111020121001), we obtain a palindrome (99009999990099).

The spelling of 100121020111100 in words is "one hundred trillion, one hundred twenty-one billion, twenty million, one hundred eleven thousand, one hundred".