20120132510531 has 4 divisors (see below), whose sum is σ = 20120534344512. Its totient is φ = 20119730676552.

The previous prime is 20120132510509. The next prime is 20120132510609. The reversal of 20120132510531 is 13501523102102.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20120132510531 - 2²² = 20120128316227 is a prime.

It is a super-2 number, since 2×20120132510531² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20120132510531.

It is not an unprimeable number, because it can be changed into a prime (20120132515531) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 200841875 + ... + 200942028.

It is an arithmetic number, because the mean of its divisors is an integer number (5030133586128).

Almost surely, 2^{20120132510531} is an apocalyptic number.

20120132510531 is a deficient number, since it is larger than the sum of its proper divisors (401833981).

20120132510531 is an equidigital number, since it uses as much as digits as its factorization.

20120132510531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 401833980.

The product of its (nonzero) digits is 1800, while the sum is 26.

Adding to 20120132510531 its reverse (13501523102102), we get a palindrome (33621655612633).

The spelling of 20120132510531 in words is "twenty trillion, one hundred twenty billion, one hundred thirty-two million, five hundred ten thousand, five hundred thirty-one".