22521240412 has 24 divisors (see below), whose sum is σ = 43182866160. Its totient is φ = 10192220160.

The previous prime is 22521240383. The next prime is 22521240421. The reversal of 22521240412 is 21404212522.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1107493 + ... + 1127644.

It is an arithmetic number, because the mean of its divisors is an integer number (1799286090).

Almost surely, 2^22521240412 is an apocalyptic number.

22521240412 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

22521240412 is a deficient number, since it is larger than the sum of its proper divisors (20661625748).

22521240412 is a wasteful number, since it uses less digits than its factorization.

22521240412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2235381 (or 2235379 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 25.

Adding to 22521240412 its reverse (21404212522), we get a palindrome (43925452934).

The spelling of 22521240412 in words is "twenty-two billion, five hundred twenty-one million, two hundred forty thousand, four hundred twelve".