12521366890 has 16 divisors (see below), whose sum is σ = 23724695520. Its totient is φ = 4744938960.

The previous prime is 12521366873. The next prime is 12521366933. The reversal of 12521366890 is 9866312521.

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, 32950776 + ... + 32951155.

It is an arithmetic number, because the mean of its divisors is an integer number (1482793470).

Almost surely, 2^12521366890 is an apocalyptic number.

12521366890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12521366890 is a deficient number, since it is larger than the sum of its proper divisors (11203328630).

12521366890 is a wasteful number, since it uses less digits than its factorization.

12521366890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65901957.

The product of its (nonzero) digits is 155520, while the sum is 43.

The spelling of 12521366890 in words is "twelve billion, five hundred twenty-one million, three hundred sixty-six thousand, eight hundred ninety".