221111220032312 has 8 divisors (see below), whose sum is σ = 414583537560600. Its totient is φ = 110555610016152.

The previous prime is 221111220032299. The next prime is 221111220032321. The reversal of 221111220032312 is 213230022111122.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13819451252012 + ... + 13819451252027.

It is an arithmetic number, because the mean of its divisors is an integer number (51822942195075).

Almost surely, 2^{221111220032312} is an apocalyptic number.

It is an amenable number.

221111220032312 is a deficient number, since it is larger than the sum of its proper divisors (193472317528288).

221111220032312 is a wasteful number, since it uses less digits than its factorization.

221111220032312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27638902504045 (or 27638902504041 counting only the distinct ones).

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

Adding to 221111220032312 its reverse (213230022111122), we get a palindrome (434341242143434).

The spelling of 221111220032312 in words is "two hundred twenty-one trillion, one hundred eleven billion, two hundred twenty million, thirty-two thousand, three hundred twelve".