1021345232555 has 16 divisors (see below), whose sum is σ = 1286593459200. Its totient is φ = 777316867680.

The previous prime is 1021345232521. The next prime is 1021345232581. The reversal of 1021345232555 is 5552325431201.

It is not a de Polignac number, because 1021345232555 - 2¹⁶ = 1021345167019 is a prime.

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, 55832585 + ... + 55850874.

It is an arithmetic number, because the mean of its divisors is an integer number (80412091200).

Almost surely, 2^{1021345232555} is an apocalyptic number.

1021345232555 is a deficient number, since it is larger than the sum of its proper divisors (265248226645).

1021345232555 is a wasteful number, since it uses less digits than its factorization.

1021345232555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111683554.

The product of its (nonzero) digits is 180000, while the sum is 38.

The spelling of 1021345232555 in words is "one trillion, twenty-one billion, three hundred forty-five million, two hundred thirty-two thousand, five hundred fifty-five".