1021222120200 has 48 divisors (see below), whose sum is σ = 3165788574480. Its totient is φ = 272325898560.

The previous prime is 1021222120159. The next prime is 1021222120207. The reversal of 1021222120200 is 20212221201.

1021222120200 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

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 1021222120200.

It is not an unprimeable number, because it can be changed into a prime (1021222120207) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 851017834 + ... + 851019033.

It is an arithmetic number, because the mean of its divisors is an integer number (65953928635).

Almost surely, 2^{1021222120200} is an apocalyptic number.

1021222120200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1021222120200 is an abundant number, since it is smaller than the sum of its proper divisors (2144566454280).

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

1021222120200 is a wasteful number, since it uses less digits than its factorization.

1021222120200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1702036886 (or 1702036877 counting only the distinct ones).

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

Adding to 1021222120200 its reverse (20212221201), we get a palindrome (1041434341401).

The spelling of 1021222120200 in words is "one trillion, twenty-one billion, two hundred twenty-two million, one hundred twenty thousand, two hundred".