12611632021 has 8 divisors (see below), whose sum is σ = 13480939584. Its totient is φ = 11769072480.

The previous prime is 12611632001. The next prime is 12611632031. The reversal of 12611632021 is 12023611621.

It is a happy number.

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 12611632021 - 2¹¹ = 12611629973 is a prime.

It is a super-2 number, since 2×12611632021² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12611632001) 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, 6686031 + ... + 6687916.

It is an arithmetic number, because the mean of its divisors is an integer number (1685117448).

Almost surely, 2^12611632021 is an apocalyptic number.

It is an amenable number.

12611632021 is a deficient number, since it is larger than the sum of its proper divisors (869307563).

12611632021 is a wasteful number, since it uses less digits than its factorization.

12611632021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13374011.

The product of its (nonzero) digits is 864, while the sum is 25.

The spelling of 12611632021 in words is "twelve billion, six hundred eleven million, six hundred thirty-two thousand, twenty-one".