1220121011212 has 12 divisors (see below), whose sum is σ = 2135676281200. Its totient is φ = 609927788016.

The previous prime is 1220121011209. The next prime is 1220121011227. The reversal of 1220121011212 is 2121101210221.

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, 33158712 + ... + 33195487.

Almost surely, 2^{1220121011212} is an apocalyptic number.

It is an amenable number.

1220121011212 is a deficient number, since it is larger than the sum of its proper divisors (915555269988).

1220121011212 is a wasteful number, since it uses less digits than its factorization.

1220121011212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66358800 (or 66358798 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 1220121011212 its reverse (2121101210221), we get a palindrome (3341222221433).

The spelling of 1220121011212 in words is "one trillion, two hundred twenty billion, one hundred twenty-one million, eleven thousand, two hundred twelve".