11522515212 has 144 divisors (see below), whose sum is σ = 32426153760. Its totient is φ = 3427660800.

The previous prime is 11522515181. The next prime is 11522515223. The reversal of 11522515212 is 21251522511.

11522515212 is a `hidden beast` number, since 115 + 2 + 25 + 1 + 521 + 2 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1680912 + ... + 1687752.

Almost surely, 2^11522515212 is an apocalyptic number.

11522515212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11522515212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16213076880).

11522515212 is an abundant number, since it is smaller than the sum of its proper divisors (20903638548).

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

11522515212 is a wasteful number, since it uses less digits than its factorization.

11522515212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6984 (or 6979 counting only the distinct ones).

The product of its digits is 2000, while the sum is 27.

The spelling of 11522515212 in words is "eleven billion, five hundred twenty-two million, five hundred fifteen thousand, two hundred twelve".