221211220111122 has 16 divisors (see below), whose sum is σ = 442436643107712. Its totient is φ = 73734706222800.

The previous prime is 221211220111111. The next prime is 221211220111249. The reversal of 221211220111122 is 221111022112122.

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, 591584413 + ... + 591958224.

It is an arithmetic number, because the mean of its divisors is an integer number (27652290194232).

Almost surely, 2^{221211220111122} is an apocalyptic number.

221211220111122 is an abundant number, since it is smaller than the sum of its proper divisors (221225422996590).

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

221211220111122 is a wasteful number, since it uses less digits than its factorization.

221211220111122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1183573793.

The product of its (nonzero) digits is 128, while the sum is 21.

Adding to 221211220111122 its reverse (221111022112122), we get a palindrome (442322242223244).

The spelling of 221211220111122 in words is "two hundred twenty-one trillion, two hundred eleven billion, two hundred twenty million, one hundred eleven thousand, one hundred twenty-two".