102021221021100 has 72 divisors (see below), whose sum is σ = 295288623599760. Its totient is φ = 27195776532480.

The previous prime is 102021221021087. The next prime is 102021221021131. The reversal of 102021221021100 is 1120122120201.

It is a super-2 number, since 2×102021221021100² (a number of 29 digits) contains 22 as substring.

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 102021221021100.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 60937765 + ... + 62589564.

It is an arithmetic number, because the mean of its divisors is an integer number (4101230883330).

Almost surely, 2^{102021221021100} is an apocalyptic number.

102021221021100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102021221021100 is an abundant number, since it is smaller than the sum of its proper divisors (193267402578660).

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

102021221021100 is a wasteful number, since it uses less digits than its factorization.

102021221021100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123530099 (or 123530092 counting only the distinct ones).

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

Adding to 102021221021100 its reverse (1120122120201), we get a palindrome (103141343141301).

The spelling of 102021221021100 in words is "one hundred two trillion, twenty-one billion, two hundred twenty-one million, twenty-one thousand, one hundred".