221220001012 has 96 divisors (see below), whose sum is σ = 436228934400. Its totient is φ = 97543176192.

The previous prime is 221220001003. The next prime is 221220001027. The reversal of 221220001012 is 210100022122.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 221220000983 and 221220001001.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 83070393 + ... + 83073055.

It is an arithmetic number, because the mean of its divisors is an integer number (4544051400).

Almost surely, 2^221220001012 is an apocalyptic number.

It is an amenable number.

221220001012 is a deficient number, since it is larger than the sum of its proper divisors (215008933388).

221220001012 is a wasteful number, since it uses less digits than its factorization.

221220001012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3385 (or 3383 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 221220001012 its reverse (210100022122), we get a palindrome (431320023134).

The spelling of 221220001012 in words is "two hundred twenty-one billion, two hundred twenty million, one thousand, twelve".