1321431122416 has 40 divisors (see below), whose sum is σ = 2624696633664. Its totient is φ = 644114365440.

The previous prime is 1321431122327. The next prime is 1321431122437. The reversal of 1321431122416 is 6142211341231.

It is a happy number.

It is a super-2 number, since 2×1321431122416² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

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, 111516 + ... + 1629508.

Almost surely, 2^{1321431122416} is an apocalyptic number.

1321431122416 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1321431122416 is a deficient number, since it is larger than the sum of its proper divisors (1303265511248).

1321431122416 is a wasteful number, since it uses less digits than its factorization.

1321431122416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1519369 (or 1519363 counting only the distinct ones).

The product of its digits is 6912, while the sum is 31.

Adding to 1321431122416 its reverse (6142211341231), we get a palindrome (7463642463647).

The spelling of 1321431122416 in words is "one trillion, three hundred twenty-one billion, four hundred thirty-one million, one hundred twenty-two thousand, four hundred sixteen".