2121230052 has 24 divisors (see below), whose sum is σ = 5499485600. Its totient is φ = 707076648.

The previous prime is 2121230051. The next prime is 2121230071. The reversal of 2121230052 is 2500321212.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (2121230051) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9820402 + ... + 9820617.

Almost surely, 2^2121230052 is an apocalyptic number.

It is an amenable number.

2121230052 is an abundant number, since it is smaller than the sum of its proper divisors (3378255548).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2121230052 is a wasteful number, since it uses less digits than its factorization.

2121230052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19641032 (or 19641024 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 2121230052 is about 46056.8133070450. The cubic root of 2121230052 is about 1284.8800630942.

Adding to 2121230052 its reverse (2500321212), we get a palindrome (4621551264).

The spelling of 2121230052 in words is "two billion, one hundred twenty-one million, two hundred thirty thousand, fifty-two".