12166031 has 4 divisors (see below), whose sum is σ = 12291552. Its totient is φ = 12040512.

The previous prime is 12166027. The next prime is 12166039. The reversal of 12166031 is 13066121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13066121 = 389 ⋅33589.

It is a cyclic number.

It is not a de Polignac number, because 12166031 - 2² = 12166027 is a prime.

It is a super-2 number, since 2×12166031² = 296024620585922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12165994 and 12166012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12166039) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62615 + ... + 62808.

It is an arithmetic number, because the mean of its divisors is an integer number (3072888).

Almost surely, 2^12166031 is an apocalyptic number.

12166031 is a deficient number, since it is larger than the sum of its proper divisors (125521).

12166031 is an equidigital number, since it uses as much as digits as its factorization.

12166031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125520.

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

The square root of 12166031 is about 3487.9838015679. The cubic root of 12166031 is about 229.9938939778.

The spelling of 12166031 in words is "twelve million, one hundred sixty-six thousand, thirty-one".