10249097921 has 4 divisors (see below), whose sum is σ = 10851986052. Its totient is φ = 9646209792.

The previous prime is 10249097909. The next prime is 10249097927. The reversal of 10249097921 is 12979094201.

10249097921 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12979094201 = 1579 ⋅8219819.

It can be written as a sum of positive squares in 2 ways, for example, as 3064840321 + 7184257600 = 55361^2 + 84760^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10249097921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10249097927) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 301444040 + ... + 301444073.

It is an arithmetic number, because the mean of its divisors is an integer number (2712996513).

Almost surely, 2^10249097921 is an apocalyptic number.

It is an amenable number.

10249097921 is a deficient number, since it is larger than the sum of its proper divisors (602888131).

10249097921 is an equidigital number, since it uses as much as digits as its factorization.

10249097921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 602888130.

The product of its (nonzero) digits is 81648, while the sum is 44.

The spelling of 10249097921 in words is "ten billion, two hundred forty-nine million, ninety-seven thousand, nine hundred twenty-one".