252112155021 has 20 divisors (see below), whose sum is σ = 376897672800. Its totient is φ = 167947272936.

The previous prime is 252112154993. The next prime is 252112155047. The reversal of 252112155021 is 120551211252.

252112155021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 252112155021 - 2¹¹ = 252112152973 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (252112155121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1073031 + ... + 1286708.

It is an arithmetic number, because the mean of its divisors is an integer number (18844883640).

Almost surely, 2^252112155021 is an apocalyptic number.

It is an amenable number.

252112155021 is a deficient number, since it is larger than the sum of its proper divisors (124785517779).

252112155021 is a wasteful number, since it uses less digits than its factorization.

252112155021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2361070 (or 2361061 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 27.

Adding to 252112155021 its reverse (120551211252), we get a palindrome (372663366273).

The spelling of 252112155021 in words is "two hundred fifty-two billion, one hundred twelve million, one hundred fifty-five thousand, twenty-one".