12291195988 has 48 divisors (see below), whose sum is σ = 23224824000. Its totient is φ = 5672574720.

The previous prime is 12291195979. The next prime is 12291195997. The reversal of 12291195988 is 88959119221.

It is an interprime number because it is at equal distance from previous prime (12291195979) and next prime (12291195997).

It is a super-2 number, since 2×12291195988² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (55) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2824038 + ... + 2828386.

It is an arithmetic number, because the mean of its divisors is an integer number (483850500).

Almost surely, 2^12291195988 is an apocalyptic number.

It is an amenable number.

12291195988 is a deficient number, since it is larger than the sum of its proper divisors (10933628012).

12291195988 is a wasteful number, since it uses less digits than its factorization.

12291195988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5320 (or 5318 counting only the distinct ones).

The product of its digits is 933120, while the sum is 55.

The spelling of 12291195988 in words is "twelve billion, two hundred ninety-one million, one hundred ninety-five thousand, nine hundred eighty-eight".