1321023052402 has 8 divisors (see below), whose sum is σ = 1981580737500. Its totient is φ = 660496139904.

The previous prime is 1321023052397. The next prime is 1321023052403. The reversal of 1321023052402 is 2042503201231.

It can be written as a sum of positive squares in 2 ways, for example, as 1257585059241 + 63437993161 = 1121421^2 + 251869^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (1321023052403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7585527 + ... + 7757722.

Almost surely, 2^{1321023052402} is an apocalyptic number.

1321023052402 is a deficient number, since it is larger than the sum of its proper divisors (660557685098).

1321023052402 is a wasteful number, since it uses less digits than its factorization.

1321023052402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15386300.

The product of its (nonzero) digits is 2880, while the sum is 25.

Adding to 1321023052402 its reverse (2042503201231), we get a palindrome (3363526253633).

The spelling of 1321023052402 in words is "one trillion, three hundred twenty-one billion, twenty-three million, fifty-two thousand, four hundred two".