221342111312 has 40 divisors (see below), whose sum is σ = 490706092800. Its totient is φ = 94746436992.

The previous prime is 221342111299. The next prime is 221342111351. The reversal of 221342111312 is 213111243122.

It is a super-2 number, since 2×221342111312² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

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, 1099112 + ... + 1284807.

It is an arithmetic number, because the mean of its divisors is an integer number (12267652320).

Almost surely, 2^221342111312 is an apocalyptic number.

It is an amenable number.

221342111312 is an abundant number, since it is smaller than the sum of its proper divisors (269363981488).

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

221342111312 is a wasteful number, since it uses less digits than its factorization.

221342111312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2384763 (or 2384757 counting only the distinct ones).

The product of its digits is 576, while the sum is 23.

Adding to 221342111312 its reverse (213111243122), we get a palindrome (434453354434).

The spelling of 221342111312 in words is "two hundred twenty-one billion, three hundred forty-two million, one hundred eleven thousand, three hundred twelve".