9925012421 has 4 divisors (see below), whose sum is σ = 10245174144. Its totient is φ = 9604850700.

The previous prime is 9925012379. The next prime is 9925012441. The reversal of 9925012421 is 1242105299.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9925012421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9925012441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 160080815 + ... + 160080876.

It is an arithmetic number, because the mean of its divisors is an integer number (2561293536).

Almost surely, 2^9925012421 is an apocalyptic number.

It is an amenable number.

9925012421 is a deficient number, since it is larger than the sum of its proper divisors (320161723).

9925012421 is a wasteful number, since it uses less digits than its factorization.

9925012421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 320161722.

The product of its (nonzero) digits is 12960, while the sum is 35.

The square root of 9925012421 is about 99624.3565650489. The cubic root of 9925012421 is about 2149.0359781983.

The spelling of 9925012421 in words is "nine billion, nine hundred twenty-five million, twelve thousand, four hundred twenty-one".