10311220121 has 4 divisors (see below), whose sum is σ = 10314122532. Its totient is φ = 10308317712.

The previous prime is 10311220039. The next prime is 10311220141. The reversal of 10311220121 is 12102211301.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12102211301 = 179 ⋅67610119.

It can be written as a sum of positive squares in 2 ways, for example, as 6156128521 + 4155091600 = 78461^2 + 64460^2 .

It is a cyclic number.

It is not a de Polignac number, because 10311220121 - 2¹⁸ = 10310957977 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 10311220096 and 10311220105.

It is not an unprimeable number, because it can be changed into a prime (10311220141) 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, 1445870 + ... + 1452983.

It is an arithmetic number, because the mean of its divisors is an integer number (2578530633).

Almost surely, 2^10311220121 is an apocalyptic number.

It is an amenable number.

10311220121 is a deficient number, since it is larger than the sum of its proper divisors (2902411).

10311220121 is an equidigital number, since it uses as much as digits as its factorization.

10311220121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2902410.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 10311220121 its reverse (12102211301), we get a palindrome (22413431422).

The spelling of 10311220121 in words is "ten billion, three hundred eleven million, two hundred twenty thousand, one hundred twenty-one".