102101221021020 has 48 divisors (see below), whose sum is σ = 307874451081120. Its totient is φ = 25132608251136.

The previous prime is 102101221021013. The next prime is 102101221021031. The reversal of 102101221021020 is 20120122101201.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

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, 65449499875 + ... + 65449501434.

It is an arithmetic number, because the mean of its divisors is an integer number (6414051064190).

Almost surely, 2^{102101221021020} is an apocalyptic number.

102101221021020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102101221021020 is an abundant number, since it is smaller than the sum of its proper divisors (205773230060100).

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

102101221021020 is a wasteful number, since it uses less digits than its factorization.

102101221021020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130899001334 (or 130899001332 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 102101221021020 its reverse (20120122101201), we get a palindrome (122221343122221).

The spelling of 102101221021020 in words is "one hundred two trillion, one hundred one billion, two hundred twenty-one million, twenty-one thousand, twenty".