10399297121 has 4 divisors (see below), whose sum is σ = 10399921092. Its totient is φ = 10398673152.

The previous prime is 10399297081. The next prime is 10399297133. The reversal of 10399297121 is 12179299301.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12179299301 = 13 ⋅936869177.

It can be written as a sum of positive squares in 2 ways, for example, as 225750625 + 10173546496 = 15025^2 + 100864^2 .

It is a cyclic number.

It is not a de Polignac number, because 10399297121 - 2²⁶ = 10332188257 is a prime.

It is a super-2 number, since 2×10399297121² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10399297421) 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, 286280 + ... + 320553.

It is an arithmetic number, because the mean of its divisors is an integer number (2599980273).

Almost surely, 2^10399297121 is an apocalyptic number.

It is an amenable number.

10399297121 is a deficient number, since it is larger than the sum of its proper divisors (623971).

10399297121 is an equidigital number, since it uses as much as digits as its factorization.

10399297121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 623970.

The product of its (nonzero) digits is 61236, while the sum is 44.

The spelling of 10399297121 in words is "ten billion, three hundred ninety-nine million, two hundred ninety-seven thousand, one hundred twenty-one".