100020121210120 has 64 divisors (see below), whose sum is σ = 225325007107200. Its totient is φ = 39958341880320.

The previous prime is 100020121210057. The next prime is 100020121210199. The reversal of 100020121210120 is 21012121020001.

It is a self number, because there is not a number n which added to its sum of digits gives 100020121210120.

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, 133995372 + ... + 134739748.

It is an arithmetic number, because the mean of its divisors is an integer number (3520703236050).

Almost surely, 2^{100020121210120} is an apocalyptic number.

100020121210120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100020121210120 is an abundant number, since it is smaller than the sum of its proper divisors (125304885897080).

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

100020121210120 is a wasteful number, since it uses less digits than its factorization.

100020121210120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 748558 (or 748554 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 100020121210120 its reverse (21012121020001), we get a palindrome (121032242230121).

The spelling of 100020121210120 in words is "one hundred trillion, twenty billion, one hundred twenty-one million, two hundred ten thousand, one hundred twenty".