1373621258021 has 8 divisors (see below), whose sum is σ = 1378122720000. Its totient is φ = 1369120339440.

The previous prime is 1373621257997. The next prime is 1373621258027. The reversal of 1373621258021 is 1208521263731.

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

It is a cyclic number.

It is not a de Polignac number, because 1373621258021 - 2³⁴ = 1356441388837 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1373621258021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1373621258027) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5280980 + ... + 5534978.

It is an arithmetic number, because the mean of its divisors is an integer number (172265340000).

Almost surely, 2^{1373621258021} is an apocalyptic number.

It is an amenable number.

1373621258021 is a deficient number, since it is larger than the sum of its proper divisors (4501461979).

1373621258021 is a wasteful number, since it uses less digits than its factorization.

1373621258021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271699.

The product of its (nonzero) digits is 120960, while the sum is 41.

The spelling of 1373621258021 in words is "one trillion, three hundred seventy-three billion, six hundred twenty-one million, two hundred fifty-eight thousand, twenty-one".