221002020122100 has 144 divisors (see below), whose sum is σ = 732987810110976. Its totient is φ = 50362134768000.

The previous prime is 221002020122089. The next prime is 221002020122111. The reversal of 221002020122100 is 1221020200122.

It is an interprime number because it is at equal distance from previous prime (221002020122089) and next prime (221002020122111).

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 221002020122100.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 158276286 + ... + 159666485.

Almost surely, 2^{221002020122100} is an apocalyptic number.

221002020122100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221002020122100 is an abundant number, since it is smaller than the sum of its proper divisors (511985789988876).

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

221002020122100 is a wasteful number, since it uses less digits than its factorization.

221002020122100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317943126 (or 317943119 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 221002020122100 its reverse (1221020200122), we get a palindrome (222223040322222).

The spelling of 221002020122100 in words is "two hundred twenty-one trillion, two billion, twenty million, one hundred twenty-two thousand, one hundred".