12391171022 has 8 divisors (see below), whose sum is σ = 18642910872. Its totient is φ = 6176867400.

The previous prime is 12391170997. The next prime is 12391171027. The reversal of 12391171022 is 22017119321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×12391171022² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12391171027) 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, 9358229 + ... + 9359552.

It is an arithmetic number, because the mean of its divisors is an integer number (2330363859).

Almost surely, 2^12391171022 is an apocalyptic number.

12391171022 is a deficient number, since it is larger than the sum of its proper divisors (6251739850).

12391171022 is a wasteful number, since it uses less digits than its factorization.

12391171022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18718114.

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

The spelling of 12391171022 in words is "twelve billion, three hundred ninety-one million, one hundred seventy-one thousand, twenty-two".