1200002022100 has 72 divisors (see below), whose sum is σ = 2991586526208. Its totient is φ = 409275139200.

The previous prime is 1200002022061. The next prime is 1200002022127. The reversal of 1200002022100 is 12202000021.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a congruent number.

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, 4353967 + ... + 4621366.

It is an arithmetic number, because the mean of its divisors is an integer number (41549812864).

Almost surely, 2^{1200002022100} is an apocalyptic number.

1200002022100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1200002022100 is an abundant number, since it is smaller than the sum of its proper divisors (1791584504108).

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

1200002022100 is a wasteful number, since it uses less digits than its factorization.

1200002022100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8975545 (or 8975538 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 1200002022100 its reverse (12202000021), we get a palindrome (1212204022121).

The spelling of 1200002022100 in words is "one trillion, two hundred billion, two million, twenty-two thousand, one hundred".