221303222112312 has 48 divisors (see below), whose sum is σ = 599454358392240. Its totient is φ = 73756483452288.

The previous prime is 221303222112307. The next prime is 221303222112317. The reversal of 221303222112312 is 213211222303122.

221303222112312 is a `hidden beast` number, since 2 + 2 + 1 + 3 + 0 + 322 + 21 + 1 + 2 + 312 = 666.

It is an interprime number because it is at equal distance from previous prime (221303222112307) and next prime (221303222112317).

It is a super-2 number, since 2×221303222112312² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221303222112317) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 234050988 + ... + 234994619.

It is an arithmetic number, because the mean of its divisors is an integer number (12488632466505).

Almost surely, 2^{221303222112312} is an apocalyptic number.

It is an amenable number.

221303222112312 is an abundant number, since it is smaller than the sum of its proper divisors (378151136279928).

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

221303222112312 is a wasteful number, since it uses less digits than its factorization.

221303222112312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 469052172 (or 469052165 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

Adding to 221303222112312 its reverse (213211222303122), we get a palindrome (434514444415434).

The spelling of 221303222112312 in words is "two hundred twenty-one trillion, three hundred three billion, two hundred twenty-two million, one hundred twelve thousand, three hundred twelve".