12136210861 has 8 divisors (see below), whose sum is σ = 12292904448. Its totient is φ = 11980488000.

The previous prime is 12136210847. The next prime is 12136210871. The reversal of 12136210861 is 16801263121.

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 12136210861 - 2⁵ = 12136210829 is a prime.

It is a super-2 number, since 2×12136210861² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12136210831) 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, 217500 + ... + 267541.

It is an arithmetic number, because the mean of its divisors is an integer number (1536613056).

Almost surely, 2^12136210861 is an apocalyptic number.

It is an amenable number.

12136210861 is a deficient number, since it is larger than the sum of its proper divisors (156693587).

12136210861 is a wasteful number, since it uses less digits than its factorization.

12136210861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 485363.

The product of its (nonzero) digits is 3456, while the sum is 31.

Adding to 12136210861 its reverse (16801263121), we get a palindrome (28937473982).

The spelling of 12136210861 in words is "twelve billion, one hundred thirty-six million, two hundred ten thousand, eight hundred sixty-one".