221221101122122 has 8 divisors (see below), whose sum is σ = 331831847844900. Its totient is φ = 110610485173824.

The previous prime is 221221101122117. The next prime is 221221101122167.

221221101122122 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 2 ways, for example, as 147205345418041 + 74015755704081 = 12132821^2 + 8603241^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 221221101122093 and 221221101122102.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28349097 + ... + 35300332.

Almost surely, 2^{221221101122122} is an apocalyptic number.

221221101122122 is a deficient number, since it is larger than the sum of its proper divisors (110610746722778).

221221101122122 is a wasteful number, since it uses less digits than its factorization.

221221101122122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65387240.

The product of its (nonzero) digits is 256, while the sum is 22.

It can be divided in two parts, 22122110 and 1122122, that added together give a palindrome (23244232).

The spelling of 221221101122122 in words is "two hundred twenty-one trillion, two hundred twenty-one billion, one hundred one million, one hundred twenty-two thousand, one hundred twenty-two".