2121121232 has 20 divisors (see below), whose sum is σ = 4110558336. Its totient is φ = 1060332000.

The previous prime is 2121121231. The next prime is 2121121271. The reversal of 2121121232 is 2321211212.

It is a self number, because there is not a number n which added to its sum of digits gives 2121121232.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121121231) 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, 81857 + ... + 104607.

Almost surely, 2^2121121232 is an apocalyptic number.

It is an amenable number.

2121121232 is a deficient number, since it is larger than the sum of its proper divisors (1989437104).

2121121232 is a wasteful number, since it uses less digits than its factorization.

2121121232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28586 (or 28580 counting only the distinct ones).

The product of its digits is 96, while the sum is 17.

The square root of 2121121232 is about 46055.6319248797. The cubic root of 2121121232 is about 1284.8580910880.

Adding to 2121121232 its reverse (2321211212), we get a palindrome (4442332444).

The spelling of 2121121232 in words is "two billion, one hundred twenty-one million, one hundred twenty-one thousand, two hundred thirty-two".