201123155044251 has 96 divisors (see below), whose sum is σ = 325037616583680. Its totient is φ = 118814986080000.

The previous prime is 201123155044247. The next prime is 201123155044271. The reversal of 201123155044251 is 152440551321102.

201123155044251 is a `hidden beast` number, since 2 + 0 + 1 + 1 + 2 + 315 + 50 + 44 + 251 = 666.

It is not a de Polignac number, because 201123155044251 - 2² = 201123155044247 is a prime.

It is not an unprimeable number, because it can be changed into a prime (201123155044271) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 352915506 + ... + 353484936.

It is an arithmetic number, because the mean of its divisors is an integer number (3385808506080).

Almost surely, 2^{201123155044251} is an apocalyptic number.

201123155044251 is a deficient number, since it is larger than the sum of its proper divisors (123914461539429).

201123155044251 is a wasteful number, since it uses less digits than its factorization.

201123155044251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 570089 (or 570086 counting only the distinct ones).

The product of its (nonzero) digits is 48000, while the sum is 36.

The spelling of 201123155044251 in words is "two hundred one trillion, one hundred twenty-three billion, one hundred fifty-five million, forty-four thousand, two hundred fifty-one".