12155022112 has 24 divisors (see below), whose sum is σ = 23933324016. Its totient is φ = 6076717632.

The previous prime is 12155022101. The next prime is 12155022127. The reversal of 12155022112 is 21122055121.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 282883 + ... + 323005.

It is an arithmetic number, because the mean of its divisors is an integer number (997221834).

Almost surely, 2^12155022112 is an apocalyptic number.

It is an amenable number.

12155022112 is a deficient number, since it is larger than the sum of its proper divisors (11778301904).

12155022112 is an equidigital number, since it uses as much as digits as its factorization.

12155022112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49600 (or 49592 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 22.

Adding to 12155022112 its reverse (21122055121), we get a palindrome (33277077233).

The spelling of 12155022112 in words is "twelve billion, one hundred fifty-five million, twenty-two thousand, one hundred twelve".