1353893755021 has 4 divisors (see below), whose sum is σ = 1353898319200. Its totient is φ = 1353889190844.

The previous prime is 1353893755013. The next prime is 1353893755043. The reversal of 1353893755021 is 1205573983531.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1353893755021 - 2³ = 1353893755013 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 1353893755021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1353893755001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1803711 + ... + 2441548.

It is an arithmetic number, because the mean of its divisors is an integer number (338474579800).

Almost surely, 2^{1353893755021} is an apocalyptic number.

It is an amenable number.

1353893755021 is a deficient number, since it is larger than the sum of its proper divisors (4564179).

1353893755021 is an equidigital number, since it uses as much as digits as its factorization.

1353893755021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4564178.

The product of its (nonzero) digits is 3402000, while the sum is 52.

The spelling of 1353893755021 in words is "one trillion, three hundred fifty-three billion, eight hundred ninety-three million, seven hundred fifty-five thousand, twenty-one".