2121230331 has 24 divisors (see below), whose sum is σ = 3361892976. Its totient is φ = 1278152640.

The previous prime is 2121230311. The next prime is 2121230339. The reversal of 2121230331 is 1330321212.

2121230331 is a `hidden beast` number, since 212 + 123 + 0 + 331 = 666.

It is not a de Polignac number, because 2121230331 - 2⁷ = 2121230203 is a prime.

It is a super-2 number, since 2×2121230331² = 8999236234308739122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2121230339) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 44800 + ... + 79053.

It is an arithmetic number, because the mean of its divisors is an integer number (140078874).

Almost surely, 2^2121230331 is an apocalyptic number.

2121230331 is a deficient number, since it is larger than the sum of its proper divisors (1240662645).

2121230331 is a wasteful number, since it uses less digits than its factorization.

2121230331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124043 (or 124040 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 2121230331 is about 46056.8163359128. The cubic root of 2121230331 is about 1284.8801194265.

Adding to 2121230331 its reverse (1330321212), we get a palindrome (3451551543).

The spelling of 2121230331 in words is "two billion, one hundred twenty-one million, two hundred thirty thousand, three hundred thirty-one".