1021220122200 has 48 divisors (see below), whose sum is σ = 3165782380680. Its totient is φ = 272325365760.

The previous prime is 1021220122199. The next prime is 1021220122201. The reversal of 1021220122200 is 22210221201.

It is an interprime number because it is at equal distance from previous prime (1021220122199) and next prime (1021220122201).

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 1021220122200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021220122201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 851016169 + ... + 851017368.

Almost surely, 2^{1021220122200} is an apocalyptic number.

1021220122200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1021220122200 is an abundant number, since it is smaller than the sum of its proper divisors (2144562258480).

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

1021220122200 is a wasteful number, since it uses less digits than its factorization.

1021220122200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1702033556 (or 1702033547 counting only the distinct ones).

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

Adding to 1021220122200 its reverse (22210221201), we get a palindrome (1043430343401).

Subtracting from 1021220122200 its reverse (22210221201), we obtain a palindrome (999009900999).

The spelling of 1021220122200 in words is "one trillion, twenty-one billion, two hundred twenty million, one hundred twenty-two thousand, two hundred".