21160145522244 has 24 divisors (see below), whose sum is σ = 49434703405920. Its totient is φ = 7044663194944.

The previous prime is 21160145522231. The next prime is 21160145522261. The reversal of 21160145522244 is 44222554106112.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1089820614 + ... + 1089840029.

It is an arithmetic number, because the mean of its divisors is an integer number (2059779308580).

Almost surely, 2^{21160145522244} is an apocalyptic number.

It is an amenable number.

21160145522244 is an abundant number, since it is smaller than the sum of its proper divisors (28274557883676).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21160145522244 is a wasteful number, since it uses less digits than its factorization.

21160145522244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2179661459 (or 2179661457 counting only the distinct ones).

The product of its (nonzero) digits is 153600, while the sum is 39.

Adding to 21160145522244 its reverse (44222554106112), we get a palindrome (65382699628356).

The spelling of 21160145522244 in words is "twenty-one trillion, one hundred sixty billion, one hundred forty-five million, five hundred twenty-two thousand, two hundred forty-four".