21534125122510 has 128 divisors (see below), whose sum is σ = 52047077741568. Its totient is φ = 6195184128000.

The previous prime is 21534125122501. The next prime is 21534125122511. The reversal of 21534125122510 is 1522152143512.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21534125122511) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 153393150 + ... + 153533470.

It is an arithmetic number, because the mean of its divisors is an integer number (406617794856).

Almost surely, 2^{21534125122510} is an apocalyptic number.

21534125122510 is an abundant number, since it is smaller than the sum of its proper divisors (30512952619058).

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

21534125122510 is a wasteful number, since it uses less digits than its factorization.

21534125122510 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155690.

The product of its (nonzero) digits is 24000, while the sum is 34.

The spelling of 21534125122510 in words is "twenty-one trillion, five hundred thirty-four billion, one hundred twenty-five million, one hundred twenty-two thousand, five hundred ten".