1321022131402 has 64 divisors (see below), whose sum is σ = 2088570322944. Its totient is φ = 625890006720.

The previous prime is 1321022131397. The next prime is 1321022131421. The reversal of 1321022131402 is 2041312201231.

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, 333000823 + ... + 333004789.

It is an arithmetic number, because the mean of its divisors is an integer number (32633911296).

Almost surely, 2^{1321022131402} is an apocalyptic number.

1321022131402 is a deficient number, since it is larger than the sum of its proper divisors (767548191542).

1321022131402 is a wasteful number, since it uses less digits than its factorization.

1321022131402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4643.

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 1321022131402 its reverse (2041312201231), we get a palindrome (3362334332633).

The spelling of 1321022131402 in words is "one trillion, three hundred twenty-one billion, twenty-two million, one hundred thirty-one thousand, four hundred two".