21146530532131 has 8 divisors (see below), whose sum is σ = 21639394568880. Its totient is φ = 20653715779872.

The previous prime is 21146530532123. The next prime is 21146530532191. The reversal of 21146530532131 is 13123503564112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21146530532131 - 2³ = 21146530532123 is a prime.

It is a super-2 number, since 2×21146530532131² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21146530532191) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11452276 + ... + 13169953.

It is an arithmetic number, because the mean of its divisors is an integer number (2704924321110).

Almost surely, 2^{21146530532131} is an apocalyptic number.

21146530532131 is a deficient number, since it is larger than the sum of its proper divisors (492864036749).

21146530532131 is a wasteful number, since it uses less digits than its factorization.

21146530532131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24642245.

The product of its (nonzero) digits is 64800, while the sum is 37.

The spelling of 21146530532131 in words is "twenty-one trillion, one hundred forty-six billion, five hundred thirty million, five hundred thirty-two thousand, one hundred thirty-one".