102101012021020 has 24 divisors (see below), whose sum is σ = 214413444226800. Its totient is φ = 40840153573632.

The previous prime is 102101012021017. The next prime is 102101012021089. The reversal of 102101012021020 is 20120210101201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12352290 + ... + 18888649.

It is an arithmetic number, because the mean of its divisors is an integer number (8933893509450).

Almost surely, 2^{102101012021020} is an apocalyptic number.

102101012021020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102101012021020 is an abundant number, since it is smaller than the sum of its proper divisors (112312432205780).

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

102101012021020 is a wasteful number, since it uses less digits than its factorization.

102101012021020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31404357 (or 31404355 counting only the distinct ones).

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

Adding to 102101012021020 its reverse (20120210101201), we get a palindrome (122221222122221).

The spelling of 102101012021020 in words is "one hundred two trillion, one hundred one billion, twelve million, twenty-one thousand, twenty".