1021115205445 has 16 divisors (see below), whose sum is σ = 1252002124800. Its totient is φ = 799132713984.

The previous prime is 1021115205419. The next prime is 1021115205493. The reversal of 1021115205445 is 5445025111201.

It is a cyclic number.

It is not a de Polignac number, because 1021115205445 - 2⁵ = 1021115205413 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 531645 + ... + 1524754.

It is an arithmetic number, because the mean of its divisors is an integer number (78250132800).

Almost surely, 2^{1021115205445} is an apocalyptic number.

It is an amenable number.

1021115205445 is a deficient number, since it is larger than the sum of its proper divisors (230886919355).

1021115205445 is a wasteful number, since it uses less digits than its factorization.

1021115205445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2058564.

The product of its (nonzero) digits is 8000, while the sum is 31.

The spelling of 1021115205445 in words is "one trillion, twenty-one billion, one hundred fifteen million, two hundred five thousand, four hundred forty-five".