1321421343099 has 32 divisors (see below), whose sum is σ = 2073263136000. Its totient is φ = 738062271360.

The previous prime is 1321421343083. The next prime is 1321421343113. The reversal of 1321421343099 is 9903431241231.

It is not a de Polignac number, because 1321421343099 - 2⁴ = 1321421343083 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1321421343099.

It is not an unprimeable number, because it can be changed into a prime (1321421343019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2222524 + ... + 2753625.

It is an arithmetic number, because the mean of its divisors is an integer number (64789473000).

Almost surely, 2^{1321421343099} is an apocalyptic number.

1321421343099 is a deficient number, since it is larger than the sum of its proper divisors (751841792901).

1321421343099 is a wasteful number, since it uses less digits than its factorization.

1321421343099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4976795.

The product of its (nonzero) digits is 139968, while the sum is 42.

The spelling of 1321421343099 in words is "one trillion, three hundred twenty-one billion, four hundred twenty-one million, three hundred forty-three thousand, ninety-nine".