12022521 has 16 divisors (see below), whose sum is σ = 18816384. Its totient is φ = 6683904.

The previous prime is 12022511. The next prime is 12022531. The reversal of 12022521 is 12522021.

It is an interprime number because it is at equal distance from previous prime (12022511) and next prime (12022531).

It is not a de Polignac number, because 12022521 - 2⁷ = 12022393 is a prime.

It is a super-2 number, since 2×12022521² = 289082022390882, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12022521.

It is not an unprimeable number, because it can be changed into a prime (12022511) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6960 + ... + 8513.

It is an arithmetic number, because the mean of its divisors is an integer number (1176024).

Almost surely, 2^12022521 is an apocalyptic number.

It is an amenable number.

12022521 is a deficient number, since it is larger than the sum of its proper divisors (6793863).

12022521 is a wasteful number, since it uses less digits than its factorization.

12022521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15520.

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 12022521 is about 3467.3507177671. The cubic root of 12022521 is about 229.0859818365.

Adding to 12022521 its reverse (12522021), we get a palindrome (24544542).

Subtracting 12022521 from its reverse (12522021), we obtain a triangular number (499500 = T₉₉₉).

The spelling of 12022521 in words is "twelve million, twenty-two thousand, five hundred twenty-one".