12212548785 has 24 divisors (see below), whose sum is σ = 21201186240. Its totient is φ = 6503276832.

The previous prime is 12212548771. The next prime is 12212548801. The reversal of 12212548785 is 58784521221.

12212548785 is a `hidden beast` number, since 1 + 2 + 21 + 2 + 548 + 7 + 85 = 666.

It is not a de Polignac number, because 12212548785 - 2¹⁸ = 12212286641 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 12212548785.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 180615 + ... + 238844.

It is an arithmetic number, because the mean of its divisors is an integer number (883382760).

Almost surely, 2^12212548785 is an apocalyptic number.

12212548785 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12212548785 is a deficient number, since it is larger than the sum of its proper divisors (8988637455).

12212548785 is a wasteful number, since it uses less digits than its factorization.

12212548785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 420117 (or 420114 counting only the distinct ones).

The product of its digits is 358400, while the sum is 45.

The spelling of 12212548785 in words is "twelve billion, two hundred twelve million, five hundred forty-eight thousand, seven hundred eighty-five".