221311310442 has 64 divisors (see below), whose sum is σ = 469357977600. Its totient is φ = 69453236160.

The previous prime is 221311310419. The next prime is 221311310497. The reversal of 221311310442 is 244013113122.

It is a super-2 number, since 2×221311310442² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2166309 + ... + 2266167.

It is an arithmetic number, because the mean of its divisors is an integer number (7333718400).

Almost surely, 2^221311310442 is an apocalyptic number.

221311310442 is an abundant number, since it is smaller than the sum of its proper divisors (248046667158).

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

221311310442 is a wasteful number, since it uses less digits than its factorization.

221311310442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100211.

The product of its (nonzero) digits is 1152, while the sum is 24.

Adding to 221311310442 its reverse (244013113122), we get a palindrome (465324423564).

The spelling of 221311310442 in words is "two hundred twenty-one billion, three hundred eleven million, three hundred ten thousand, four hundred forty-two".