21011524331 has 12 divisors (see below), whose sum is σ = 24463690920. Its totient is φ = 17993878560.

The previous prime is 21011524321. The next prime is 21011524333. The reversal of 21011524331 is 13342511012.

It is not a de Polignac number, because 21011524331 - 2⁶ = 21011524267 is a prime.

It is a super-2 number, since 2×21011524331² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21011524297 and 21011524306.

It is not an unprimeable number, because it can be changed into a prime (21011524333) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 134585 + ... + 245226.

It is an arithmetic number, because the mean of its divisors is an integer number (2038640910).

Almost surely, 2^21011524331 is an apocalyptic number.

21011524331 is a deficient number, since it is larger than the sum of its proper divisors (3452166589).

21011524331 is a wasteful number, since it uses less digits than its factorization.

21011524331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 380954 (or 380947 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 23.

The spelling of 21011524331 in words is "twenty-one billion, eleven million, five hundred twenty-four thousand, three hundred thirty-one".