1321023022402 has 16 divisors (see below), whose sum is σ = 2010313482624. Its totient is φ = 650926584000.

The previous prime is 1321023022357. The next prime is 1321023022471. The reversal of 1321023022402 is 2042203201231.

It is a super-2 number, since 2×1321023022402² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1684599 + ... + 2340922.

It is an arithmetic number, because the mean of its divisors is an integer number (125644592664).

Almost surely, 2^{1321023022402} is an apocalyptic number.

1321023022402 is a deficient number, since it is larger than the sum of its proper divisors (689290460222).

1321023022402 is a wasteful number, since it uses less digits than its factorization.

1321023022402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4027905.

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 1321023022402 its reverse (2042203201231), we get a palindrome (3363226223633).

The spelling of 1321023022402 in words is "one trillion, three hundred twenty-one billion, twenty-three million, twenty-two thousand, four hundred two".