102001121111220 has 96 divisors (see below), whose sum is σ = 293327222498688. Its totient is φ = 26464697436672.

The previous prime is 102001121111207. The next prime is 102001121111299. The reversal of 102001121111220 is 22111121100201.

It is a happy number.

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 102001121111220.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 138789762 + ... + 139522758.

It is an arithmetic number, because the mean of its divisors is an integer number (3055491901028).

Almost surely, 2^{102001121111220} is an apocalyptic number.

102001121111220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102001121111220 is an abundant number, since it is smaller than the sum of its proper divisors (191326101387468).

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

102001121111220 is a wasteful number, since it uses less digits than its factorization.

102001121111220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 795729 (or 795727 counting only the distinct ones).

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

Adding to 102001121111220 its reverse (22111121100201), we get a palindrome (124112242211421).

The spelling of 102001121111220 in words is "one hundred two trillion, one billion, one hundred twenty-one million, one hundred eleven thousand, two hundred twenty".