12213042440 has 16 divisors (see below), whose sum is σ = 27479345580. Its totient is φ = 4885216960.

The previous prime is 12213042419. The next prime is 12213042461. The reversal of 12213042440 is 4424031221.

It is an interprime number because it is at equal distance from previous prime (12213042419) and next prime (12213042461).

It can be written as a sum of positive squares in 2 ways, for example, as 12037161796 + 175880644 = 109714^2 + 13262^2 .

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, 152662991 + ... + 152663070.

Almost surely, 2^12213042440 is an apocalyptic number.

12213042440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12213042440 is an abundant number, since it is smaller than the sum of its proper divisors (15266303140).

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

12213042440 is a wasteful number, since it uses less digits than its factorization.

12213042440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305326072 (or 305326068 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 12213042440 its reverse (4424031221), we get a palindrome (16637073661).

The spelling of 12213042440 in words is "twelve billion, two hundred thirteen million, forty-two thousand, four hundred forty".