2123132121 has 32 divisors (see below), whose sum is σ = 3434797440. Its totient is φ = 1285444800.

The previous prime is 2123132119. The next prime is 2123132153. The reversal of 2123132121 is 1212313212.

It is not a de Polignac number, because 2123132121 - 2¹ = 2123132119 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2123132094 and 2123132103.

It is not an unprimeable number, because it can be changed into a prime (2123132111) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 347731 + ... + 353783.

It is an arithmetic number, because the mean of its divisors is an integer number (107337420).

Almost surely, 2^2123132121 is an apocalyptic number.

It is an amenable number.

2123132121 is a deficient number, since it is larger than the sum of its proper divisors (1311665319).

2123132121 is a wasteful number, since it uses less digits than its factorization.

2123132121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7254 (or 7248 counting only the distinct ones).

The product of its digits is 144, while the sum is 18.

The square root of 2123132121 is about 46077.4578400328. The cubic root of 2123132121 is about 1285.2639913440.

Adding to 2123132121 its reverse (1212313212), we get a palindrome (3335445333).

The spelling of 2123132121 in words is "two billion, one hundred twenty-three million, one hundred thirty-two thousand, one hundred twenty-one".