1321401234402 has 24 divisors (see below), whose sum is σ = 2863485501084. Its totient is φ = 440397925344.

The previous prime is 1321401234367. The next prime is 1321401234431. The reversal of 1321401234402 is 2044321041231.

1321401234402 is a `hidden beast` number, since 1 + 3 + 21 + 4 + 0 + 1 + 234 + 402 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1316529054801 + 4872179601 = 1147401^2 + 69801^2 .

It is a super-2 number, since 2×1321401234402² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5644833 + ... + 5874260.

Almost surely, 2^{1321401234402} is an apocalyptic number.

1321401234402 is an abundant number, since it is smaller than the sum of its proper divisors (1542084266682).

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

1321401234402 is a wasteful number, since it uses less digits than its factorization.

1321401234402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11525474 (or 11525471 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

Adding to 1321401234402 its reverse (2044321041231), we get a palindrome (3365722275633).

The spelling of 1321401234402 in words is "one trillion, three hundred twenty-one billion, four hundred one million, two hundred thirty-four thousand, four hundred two".