2123951912 has 8 divisors (see below), whose sum is σ = 3982409850. Its totient is φ = 1061975952.

The previous prime is 2123951911. The next prime is 2123951983. The reversal of 2123951912 is 2191593212.

It can be written as a sum of positive squares in only one way, i.e., 1811864356 + 312087556 = 42566^2 + 17666^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×2123951912² = 9022343448976911488, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2123951911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132746987 + ... + 132747002.

Almost surely, 2^2123951912 is an apocalyptic number.

It is an amenable number.

2123951912 is a deficient number, since it is larger than the sum of its proper divisors (1858457938).

2123951912 is a wasteful number, since it uses less digits than its factorization.

2123951912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 265493995 (or 265493991 counting only the distinct ones).

The product of its digits is 9720, while the sum is 35.

The square root of 2123951912 is about 46086.3527738961. The cubic root of 2123951912 is about 1285.4293935594.

The spelling of 2123951912 in words is "two billion, one hundred twenty-three million, nine hundred fifty-one thousand, nine hundred twelve".