12210521445 has 32 divisors (see below), whose sum is σ = 22212432000. Its totient is φ = 6360826752.

The previous prime is 12210521443. The next prime is 12210521447. The reversal of 12210521445 is 54412501221.

It is a happy number.

12210521445 is a `hidden beast` number, since 1 + 2 + 210 + 5 + 2 + 1 + 445 = 666.

It is an interprime number because it is at equal distance from previous prime (12210521443) and next prime (12210521447).

It is not a de Polignac number, because 12210521445 - 2¹ = 12210521443 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12210521443) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1045920 + ... + 1057529.

It is an arithmetic number, because the mean of its divisors is an integer number (694138500).

Almost surely, 2^12210521445 is an apocalyptic number.

12210521445 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12210521445 is a deficient number, since it is larger than the sum of its proper divisors (10001910555).

12210521445 is a wasteful number, since it uses less digits than its factorization.

12210521445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2103506 (or 2103500 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 27.

The spelling of 12210521445 in words is "twelve billion, two hundred ten million, five hundred twenty-one thousand, four hundred forty-five".