12016631 has 12 divisors (see below), whose sum is σ = 13495776. Its totient is φ = 10686720.

The previous prime is 12016621. The next prime is 12016633. The reversal of 12016631 is 13661021.

It is not a de Polignac number, because 12016631 - 2²² = 7822327 is a prime.

It is a super-2 number, since 2×12016631² = 288798841180322, which contains 22 as substring.

It is a hoax number, since the sum of its digits (20) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12016633) 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, 4631 + ... + 6743.

It is an arithmetic number, because the mean of its divisors is an integer number (1124648).

Almost surely, 2^12016631 is an apocalyptic number.

12016631 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12016631 is a deficient number, since it is larger than the sum of its proper divisors (1479145).

12016631 is a wasteful number, since it uses less digits than its factorization.

12016631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2182 (or 2171 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 12016631 is about 3466.5012620797. The cubic root of 12016631 is about 229.0485649241.

Adding to 12016631 its reverse (13661021), we get a palindrome (25677652).

The spelling of 12016631 in words is "twelve million, sixteen thousand, six hundred thirty-one".