12120945636 has 24 divisors (see below), whose sum is σ = 28284358144. Its totient is φ = 4040007840.

The previous prime is 12120945619. The next prime is 12120945637. The reversal of 12120945636 is 63654902121.

It is a super-2 number, since 2×12120945636² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12120945594 and 12120945603.

It is not an unprimeable number, because it can be changed into a prime (12120945637) 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, 171966 + ... + 231978.

Almost surely, 2^12120945636 is an apocalyptic number.

It is an amenable number.

12120945636 is an abundant number, since it is smaller than the sum of its proper divisors (16163412508).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12120945636 is a wasteful number, since it uses less digits than its factorization.

12120945636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76851 (or 76849 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 39.

The spelling of 12120945636 in words is "twelve billion, one hundred twenty million, nine hundred forty-five thousand, six hundred thirty-six".