12521606354 has 4 divisors (see below), whose sum is σ = 18782409534. Its totient is φ = 6260803176.

The previous prime is 12521606333. The next prime is 12521606371. The reversal of 12521606354 is 45360612521.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 8214703225 + 4306903129 = 90635^2 + 65627^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3130401587 + ... + 3130401590.

Almost surely, 2^12521606354 is an apocalyptic number.

12521606354 is a deficient number, since it is larger than the sum of its proper divisors (6260803180).

12521606354 is an equidigital number, since it uses as much as digits as its factorization.

12521606354 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6260803179.

The product of its (nonzero) digits is 43200, while the sum is 35.

The spelling of 12521606354 in words is "twelve billion, five hundred twenty-one million, six hundred six thousand, three hundred fifty-four".