221331313112 has 64 divisors (see below), whose sum is σ = 510982382400. Its totient is φ = 87522301440.

The previous prime is 221331313109. The next prime is 221331313121. The reversal of 221331313112 is 211313133122.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1675562 + ... + 1802822.

It is an arithmetic number, because the mean of its divisors is an integer number (7984099725).

Almost surely, 2^221331313112 is an apocalyptic number.

It is an amenable number.

221331313112 is an abundant number, since it is smaller than the sum of its proper divisors (289651069288).

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

221331313112 is a wasteful number, since it uses less digits than its factorization.

221331313112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129676 (or 129672 counting only the distinct ones).

The product of its digits is 648, while the sum is 23.

Adding to 221331313112 its reverse (211313133122), we get a palindrome (432644446234).

The spelling of 221331313112 in words is "two hundred twenty-one billion, three hundred thirty-one million, three hundred thirteen thousand, one hundred twelve".