2121569252 has 24 divisors (see below), whose sum is σ = 4051951680. Its totient is φ = 963948960.

The previous prime is 2121569251. The next prime is 2121569257. The reversal of 2121569252 is 2529651212.

It is not an unprimeable number, because it can be changed into a prime (2121569251) 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, 114449 + ... + 131687.

It is an arithmetic number, because the mean of its divisors is an integer number (168831320).

Almost surely, 2^2121569252 is an apocalyptic number.

2121569252 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

2121569252 is a deficient number, since it is larger than the sum of its proper divisors (1930382428).

2121569252 is a wasteful number, since it uses less digits than its factorization.

2121569252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20051 (or 20049 counting only the distinct ones).

The product of its digits is 21600, while the sum is 35.

The square root of 2121569252 is about 46060.4955683284. The cubic root of 2121569252 is about 1284.9485466435.

The spelling of 2121569252 in words is "two billion, one hundred twenty-one million, five hundred sixty-nine thousand, two hundred fifty-two".