102100021121020 has 96 divisors (see below), whose sum is σ = 238361279546880. Its totient is φ = 36480910049280.

The previous prime is 102100021121017. The next prime is 102100021121041. The reversal of 102100021121020 is 20121120001201.

It is a Harshad number since it is a multiple of its sum of digits (13).

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, 209066244 + ... + 209554036.

It is an arithmetic number, because the mean of its divisors is an integer number (2482929995280).

Almost surely, 2^{102100021121020} is an apocalyptic number.

102100021121020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102100021121020 is an abundant number, since it is smaller than the sum of its proper divisors (136261258425860).

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

102100021121020 is a wasteful number, since it uses less digits than its factorization.

102100021121020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 513815 (or 513813 counting only the distinct ones).

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

Adding to 102100021121020 its reverse (20121120001201), we get a palindrome (122221141122221).

The spelling of 102100021121020 in words is "one hundred two trillion, one hundred billion, twenty-one million, one hundred twenty-one thousand, twenty".