221995012616 has 32 divisors (see below), whose sum is σ = 458683800960. Its totient is φ = 100076461632.

The previous prime is 221995012597. The next prime is 221995012621. The reversal of 221995012616 is 616210599122.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24816080 + ... + 24825023.

It is an arithmetic number, because the mean of its divisors is an integer number (14333868780).

Almost surely, 2^221995012616 is an apocalyptic number.

221995012616 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

221995012616 is an abundant number, since it is smaller than the sum of its proper divisors (236688788344).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221995012616 is a wasteful number, since it uses less digits than its factorization.

221995012616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49641165 (or 49641161 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 44.

The spelling of 221995012616 in words is "two hundred twenty-one billion, nine hundred ninety-five million, twelve thousand, six hundred sixteen".