221312122404112 has 10 divisors (see below), whose sum is σ = 428792237157998. Its totient is φ = 110656061202048.

The previous prime is 221312122404059. The next prime is 221312122404151. The reversal of 221312122404112 is 211404221213122.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 219936137099536 + 1375985304576 = 14830244^2 + 1173024^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6916003825113 + ... + 6916003825144.

Almost surely, 2^{221312122404112} is an apocalyptic number.

It is an amenable number.

221312122404112 is a deficient number, since it is larger than the sum of its proper divisors (207480114753886).

221312122404112 is a wasteful number, since it uses less digits than its factorization.

221312122404112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13832007650265 (or 13832007650259 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 28.

Adding to 221312122404112 its reverse (211404221213122), we get a palindrome (432716343617234).

The spelling of 221312122404112 in words is "two hundred twenty-one trillion, three hundred twelve billion, one hundred twenty-two million, four hundred four thousand, one hundred twelve".