1021115450553 has 32 divisors (see below), whose sum is σ = 1490771423232. Its totient is φ = 616562918400.

The previous prime is 1021115450533. The next prime is 1021115450567. The reversal of 1021115450553 is 3550545111201.

It is a happy number.

It is not a de Polignac number, because 1021115450553 - 2⁹ = 1021115450041 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (1021115450533) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21662176 + ... + 21709262.

It is an arithmetic number, because the mean of its divisors is an integer number (46586606976).

Almost surely, 2^{1021115450553} is an apocalyptic number.

It is an amenable number.

1021115450553 is a deficient number, since it is larger than the sum of its proper divisors (469655972679).

1021115450553 is a wasteful number, since it uses less digits than its factorization.

1021115450553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49525.

The product of its (nonzero) digits is 15000, while the sum is 33.

The spelling of 1021115450553 in words is "one trillion, twenty-one billion, one hundred fifteen million, four hundred fifty thousand, five hundred fifty-three".