123121203552252 has 36 divisors (see below), whose sum is σ = 321262495293376. Its totient is φ = 39716517274560.

The previous prime is 123121203552251. The next prime is 123121203552271. The reversal of 123121203552252 is 252255302121321.

123121203552252 is a `hidden beast` number, since 1 + 2 + 3 + 1 + 2 + 120 + 3 + 5 + 522 + 5 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123121203552251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 55161828433 + ... + 55161830664.

Almost surely, 2^{123121203552252} is an apocalyptic number.

123121203552252 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

123121203552252 is an abundant number, since it is smaller than the sum of its proper divisors (198141291741124).

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

123121203552252 is a wasteful number, since it uses less digits than its factorization.

123121203552252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110323659138 (or 110323659133 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 36.

Adding to 123121203552252 its reverse (252255302121321), we get a palindrome (375376505673573).

The spelling of 123121203552252 in words is "one hundred twenty-three trillion, one hundred twenty-one billion, two hundred three million, five hundred fifty-two thousand, two hundred fifty-two".