12211552240 has 40 divisors (see below), whose sum is σ = 29307731328. Its totient is φ = 4727051520.

The previous prime is 12211552231. The next prime is 12211552247. The reversal of 12211552240 is 4225511221.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×12211552240² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12211552247) 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, 2459527 + ... + 2464486.

Almost surely, 2^12211552240 is an apocalyptic number.

12211552240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12211552240 is an abundant number, since it is smaller than the sum of its proper divisors (17096179088).

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

12211552240 is a wasteful number, since it uses less digits than its factorization.

12211552240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4924057 (or 4924051 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 25.

The spelling of 12211552240 in words is "twelve billion, two hundred eleven million, five hundred fifty-two thousand, two hundred forty".