1321212313422 has 128 divisors (see below), whose sum is σ = 3050716753920. Its totient is φ = 423537569280.

The previous prime is 1321212313331. The next prime is 1321212313429. The reversal of 1321212313422 is 2243132121231.

1321212313422 is a `hidden beast` number, since 1 + 3 + 2 + 1 + 2 + 1 + 231 + 3 + 422 = 666.

It is a super-2 number, since 2×1321212313422² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321212313429) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 102883722 + ... + 102896562.

It is an arithmetic number, because the mean of its divisors is an integer number (23833724640).

Almost surely, 2^{1321212313422} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1321212313422, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1525358376960).

1321212313422 is an abundant number, since it is smaller than the sum of its proper divisors (1729504440498).

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

1321212313422 is a wasteful number, since it uses less digits than its factorization.

1321212313422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13575 (or 13569 counting only the distinct ones).

The product of its digits is 3456, while the sum is 27.

Adding to 1321212313422 its reverse (2243132121231), we get a palindrome (3564344434653).

The spelling of 1321212313422 in words is "one trillion, three hundred twenty-one billion, two hundred twelve million, three hundred thirteen thousand, four hundred twenty-two".