12231015021 has 12 divisors (see below), whose sum is σ = 17930709472. Its totient is φ = 8032307976.

The previous prime is 12231014969. The next prime is 12231015029. The reversal of 12231015021 is 12051013221.

It is not a de Polignac number, because 12231015021 - 2¹³ = 12231006829 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12231014985 and 12231015003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12231015029) 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, 10141201 + ... + 10142406.

Almost surely, 2^12231015021 is an apocalyptic number.

It is an amenable number.

12231015021 is a deficient number, since it is larger than the sum of its proper divisors (5699694451).

12231015021 is a wasteful number, since it uses less digits than its factorization.

12231015021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20283680 (or 20283677 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

Adding to 12231015021 its reverse (12051013221), we get a palindrome (24282028242).

The spelling of 12231015021 in words is "twelve billion, two hundred thirty-one million, fifteen thousand, twenty-one".