2102320121 has 4 divisors (see below), whose sum is σ = 2293440144. Its totient is φ = 1911200100.

The previous prime is 2102320097. The next prime is 2102320133. The reversal of 2102320121 is 1210232012.

It is a happy number.

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 not a de Polignac number, because 2102320121 - 2¹⁰ = 2102319097 is a prime.

It is a super-2 number, since 2×2102320121² = 8839499782322909282, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2102320096 and 2102320105.

It is not an unprimeable number, because it can be changed into a prime (2102320021) 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, 95559995 + ... + 95560016.

It is an arithmetic number, because the mean of its divisors is an integer number (573360036).

Almost surely, 2^2102320121 is an apocalyptic number.

It is an amenable number.

2102320121 is a deficient number, since it is larger than the sum of its proper divisors (191120023).

2102320121 is a wasteful number, since it uses less digits than its factorization.

2102320121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191120022.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 2102320121 is about 45851.0645568890. The cubic root of 2102320121 is about 1281.0505943697.

Adding to 2102320121 its reverse (1210232012), we get a palindrome (3312552133).

It can be divided in two parts, 2102 and 320121, that added together give a palindrome (322223).

The spelling of 2102320121 in words is "two billion, one hundred two million, three hundred twenty thousand, one hundred twenty-one".