12211220232 has 64 divisors (see below), whose sum is σ = 34349472000. Its totient is φ = 4018876992.

The previous prime is 12211220209. The next prime is 12211220243. The reversal of 12211220232 is 23202211221.

12211220232 is a `hidden beast` number, since 1 + 2 + 211 + 220 + 232 = 666.

It is a super-3 number, since 3×12211220232³ (a number of 31 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (18).

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, 340743 + ... + 374870.

It is an arithmetic number, because the mean of its divisors is an integer number (536710500).

Almost surely, 2^12211220232 is an apocalyptic number.

12211220232 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12211220232 is an abundant number, since it is smaller than the sum of its proper divisors (22138251768).

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

12211220232 is a wasteful number, since it uses less digits than its factorization.

12211220232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 715707 (or 715697 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 12211220232 its reverse (23202211221), we get a palindrome (35413431453).

The spelling of 12211220232 in words is "twelve billion, two hundred eleven million, two hundred twenty thousand, two hundred thirty-two".