12161131670 has 16 divisors (see below), whose sum is σ = 22596167808. Its totient is φ = 4707534720.

The previous prime is 12161131667. The next prime is 12161131673. The reversal of 12161131670 is 7613116121.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (12161131667) and next prime (12161131673).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12161131673) 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, 19614419 + ... + 19615038.

It is an arithmetic number, because the mean of its divisors is an integer number (1412260488).

Almost surely, 2^12161131670 is an apocalyptic number.

12161131670 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12161131670 is a deficient number, since it is larger than the sum of its proper divisors (10435036138).

12161131670 is a wasteful number, since it uses less digits than its factorization.

12161131670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39229495.

The product of its (nonzero) digits is 1512, while the sum is 29.

Adding to 12161131670 its reverse (7613116121), we get a palindrome (19774247791).

The spelling of 12161131670 in words is "twelve billion, one hundred sixty-one million, one hundred thirty-one thousand, six hundred seventy".