12212340525 has 72 divisors (see below), whose sum is σ = 27271093824. Its totient is φ = 5075251200.

The previous prime is 12212340487. The next prime is 12212340527. The reversal of 12212340525 is 52504321221.

12212340525 is a `hidden beast` number, since 12 + 2 + 123 + 4 + 0 + 525 = 666.

It is not a de Polignac number, because 12212340525 - 2¹² = 12212336429 is a prime.

It is a super-2 number, since 2×12212340525² (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 (12212340527) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 335124 + ... + 369773.

It is an arithmetic number, because the mean of its divisors is an integer number (378765192).

Almost surely, 2^12212340525 is an apocalyptic number.

12212340525 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12212340525 is an abundant number, since it is smaller than the sum of its proper divisors (15058753299).

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

12212340525 is a wasteful number, since it uses less digits than its factorization.

12212340525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 704931 (or 704923 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

Adding to 12212340525 its reverse (52504321221), we get a palindrome (64716661746).

The spelling of 12212340525 in words is "twelve billion, two hundred twelve million, three hundred forty thousand, five hundred twenty-five".