1220221121012 has 12 divisors (see below), whose sum is σ = 2165462834976. Its totient is φ = 601517453880.

The previous prime is 1220221120999. The next prime is 1220221121069. The reversal of 1220221121012 is 2101211220221.

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, 2148276338 + ... + 2148276905.

It is an arithmetic number, because the mean of its divisors is an integer number (180455236248).

Almost surely, 2^{1220221121012} is an apocalyptic number.

It is an amenable number.

1220221121012 is a deficient number, since it is larger than the sum of its proper divisors (945241713964).

1220221121012 is a wasteful number, since it uses less digits than its factorization.

1220221121012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4296553318 (or 4296553316 counting only the distinct ones).

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

Adding to 1220221121012 its reverse (2101211220221), we get a palindrome (3321432341233).

The spelling of 1220221121012 in words is "one trillion, two hundred twenty billion, two hundred twenty-one million, one hundred twenty-one thousand, twelve".