1312221442 has 32 divisors (see below), whose sum is σ = 2300313600. Its totient is φ = 549823248.

The previous prime is 1312221439. The next prime is 1312221479. The reversal of 1312221442 is 2441222131.

It is a super-2 number, since 2×1312221442² = 3443850225689118728, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 108159 + ... + 119677.

It is an arithmetic number, because the mean of its divisors is an integer number (71884800).

Almost surely, 2^1312221442 is an apocalyptic number.

1312221442 is a deficient number, since it is larger than the sum of its proper divisors (988092158).

1312221442 is a wasteful number, since it uses less digits than its factorization.

1312221442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11710.

The product of its digits is 768, while the sum is 22.

The square root of 1312221442 is about 36224.5971958281. The cubic root of 1312221442 is about 1094.8023223429.

Adding to 1312221442 its reverse (2441222131), we get a palindrome (3753443573).

The spelling of 1312221442 in words is "one billion, three hundred twelve million, two hundred twenty-one thousand, four hundred forty-two".