12157212354 has 32 divisors (see below), whose sum is σ = 28122716160. Its totient is φ = 3431638992.

The previous prime is 12157212337. The next prime is 12157212383. The reversal of 12157212354 is 45321275121.

It is a happy 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, 1740234 + ... + 1747205.

It is an arithmetic number, because the mean of its divisors is an integer number (878834880).

Almost surely, 2^12157212354 is an apocalyptic number.

12157212354 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

12157212354 is an abundant number, since it is smaller than the sum of its proper divisors (15965503806).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12157212354 is a wasteful number, since it uses less digits than its factorization.

12157212354 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3487534.

The product of its digits is 16800, while the sum is 33.

Adding to 12157212354 its reverse (45321275121), we get a palindrome (57478487475).

The spelling of 12157212354 in words is "twelve billion, one hundred fifty-seven million, two hundred twelve thousand, three hundred fifty-four".