2123161312 has 12 divisors (see below), whose sum is σ = 4179973896. Its totient is φ = 1061580640.

The previous prime is 2123161309. The next prime is 2123161333. The reversal of 2123161312 is 2131613212.

It is a happy number.

It is a super-2 number, since 2×2123161312² = 9015627913547122688, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33174364 + ... + 33174427.

It is an arithmetic number, because the mean of its divisors is an integer number (348331158).

Almost surely, 2^2123161312 is an apocalyptic number.

It is an amenable number.

2123161312 is a deficient number, since it is larger than the sum of its proper divisors (2056812584).

2123161312 is an equidigital number, since it uses as much as digits as its factorization.

2123161312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66348801 (or 66348793 counting only the distinct ones).

The product of its digits is 432, while the sum is 22.

The square root of 2123161312 is about 46077.7745990407. The cubic root of 2123161312 is about 1285.2698816933.

Adding to 2123161312 its reverse (2131613212), we get a palindrome (4254774524).

The spelling of 2123161312 in words is "two billion, one hundred twenty-three million, one hundred sixty-one thousand, three hundred twelve".