2123135252 has 24 divisors (see below), whose sum is σ = 4247328960. Its totient is φ = 909688320.

The previous prime is 2123135251. The next prime is 2123135263. The reversal of 2123135252 is 2525313212.

It is a happy number.

It is a super-3 number, since 3×2123135252³ (a number of 29 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2123135251) 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, 155252 + ... + 168372.

It is an arithmetic number, because the mean of its divisors is an integer number (176972040).

Almost surely, 2^2123135252 is an apocalyptic number.

It is an amenable number.

2123135252 is an abundant number, since it is smaller than the sum of its proper divisors (2124193708).

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

2123135252 is a wasteful number, since it uses less digits than its factorization.

2123135252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18911 (or 18909 counting only the distinct ones).

The product of its digits is 3600, while the sum is 26.

The square root of 2123135252 is about 46077.4918154189. The cubic root of 2123135252 is about 1285.2646231401.

Adding to 2123135252 its reverse (2525313212), we get a palindrome (4648448464).

The spelling of 2123135252 in words is "two billion, one hundred twenty-three million, one hundred thirty-five thousand, two hundred fifty-two".