1221002110112 has 48 divisors (see below), whose sum is σ = 2554439668200. Its totient is φ = 572514828288.

The previous prime is 1221002110099. The next prime is 1221002110169. The reversal of 1221002110112 is 2110112001221.

It can be written as a sum of positive squares in 4 ways, for example, as 1209128956816 + 11873153296 = 1099604^2 + 108964^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3900737 + ... + 4202112.

Almost surely, 2^{1221002110112} is an apocalyptic number.

It is an amenable number.

1221002110112 is an abundant number, since it is smaller than the sum of its proper divisors (1333437558088).

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

1221002110112 is a wasteful number, since it uses less digits than its factorization.

1221002110112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8103153 (or 8103145 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 1221002110112 its reverse (2110112001221), we get a palindrome (3331114111333).

The spelling of 1221002110112 in words is "one trillion, two hundred twenty-one billion, two million, one hundred ten thousand, one hundred twelve".