12177121394 has 16 divisors (see below), whose sum is σ = 19250848800. Its totient is φ = 5760965664.

The previous prime is 12177121391. The next prime is 12177121399. The reversal of 12177121394 is 49312177121.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is not an unprimeable number, because it can be changed into a prime (12177121391) 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, 167312 + ... + 228795.

It is an arithmetic number, because the mean of its divisors is an integer number (1203178050).

Almost surely, 2^12177121394 is an apocalyptic number.

12177121394 is a deficient number, since it is larger than the sum of its proper divisors (7073727406).

12177121394 is a wasteful number, since it uses less digits than its factorization.

12177121394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 396937.

The product of its digits is 21168, while the sum is 38.

The spelling of 12177121394 in words is "twelve billion, one hundred seventy-seven million, one hundred twenty-one thousand, three hundred ninety-four".