12118877221 has 8 divisors (see below), whose sum is σ = 13247525088. Its totient is φ = 10994718000.

The previous prime is 12118877189. The next prime is 12118877249. The reversal of 12118877221 is 12277881121.

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 12118877221 - 2⁵ = 12118877189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12118871221) 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, 1116510 + ... + 1127311.

It is an arithmetic number, because the mean of its divisors is an integer number (1655940636).

Almost surely, 2^12118877221 is an apocalyptic number.

12118877221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12118877221 is a deficient number, since it is larger than the sum of its proper divisors (1128647867).

12118877221 is a wasteful number, since it uses less digits than its factorization.

12118877221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2244323.

The product of its digits is 25088, while the sum is 40.

The spelling of 12118877221 in words is "twelve billion, one hundred eighteen million, eight hundred seventy-seven thousand, two hundred twenty-one".