221960012 has 12 divisors (see below), whose sum is σ = 394227960. Its totient is φ = 109323456.

The previous prime is 221960009. The next prime is 221960027. The reversal of 221960012 is 210069122.

It is a self number, because there is not a number n which added to its sum of digits gives 221960012.

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, 413837 + ... + 414372.

It is an arithmetic number, because the mean of its divisors is an integer number (32852330).

Almost surely, 2^221960012 is an apocalyptic number.

It is an amenable number.

221960012 is a deficient number, since it is larger than the sum of its proper divisors (172267948).

221960012 is a wasteful number, since it uses less digits than its factorization.

221960012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 828280 (or 828278 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 221960012 is about 14898.3224559009. The cubic root of 221960012 is about 605.4685367177.

The spelling of 221960012 in words is "two hundred twenty-one million, nine hundred sixty thousand, twelve".