1212220021112 has 16 divisors (see below), whose sum is σ = 2306836608360. Its totient is φ = 597063592224.

The previous prime is 1212220021097. The next prime is 1212220021141. The reversal of 1212220021112 is 2111200222121.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1130801723 + ... + 1130802794.

Almost surely, 2^{1212220021112} is an apocalyptic number.

It is an amenable number.

1212220021112 is a deficient number, since it is larger than the sum of its proper divisors (1094616587248).

1212220021112 is a wasteful number, since it uses less digits than its factorization.

1212220021112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2261604590 (or 2261604586 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 1212220021112 its reverse (2111200222121), we get a palindrome (3323420243233).

The spelling of 1212220021112 in words is "one trillion, two hundred twelve billion, two hundred twenty million, twenty-one thousand, one hundred twelve".