2121215252 has 24 divisors (see below), whose sum is σ = 4208080800. Its totient is φ = 927494496.

The previous prime is 2121215221. The next prime is 2121215279. The reversal of 2121215252 is 2525121212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1072502 + ... + 1074477.

It is an arithmetic number, because the mean of its divisors is an integer number (175336700).

Almost surely, 2^2121215252 is an apocalyptic number.

It is an amenable number.

2121215252 is a deficient number, since it is larger than the sum of its proper divisors (2086865548).

2121215252 is a wasteful number, since it uses less digits than its factorization.

2121215252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2147015 (or 2147013 counting only the distinct ones).

The product of its digits is 800, while the sum is 23.

The square root of 2121215252 is about 46056.6526356399. The cubic root of 2121215252 is about 1284.8770748486.

Adding to 2121215252 its reverse (2525121212), we get a palindrome (4646336464).

The spelling of 2121215252 in words is "two billion, one hundred twenty-one million, two hundred fifteen thousand, two hundred fifty-two".