1211510252 has 12 divisors (see below), whose sum is σ = 2160146016. Its totient is φ = 594325680.

The previous prime is 1211510233. The next prime is 1211510273. The reversal of 1211510252 is 2520151121.

It is a super-2 number, since 2×1211510252² = 2935514181402207008, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2857124 + ... + 2857547.

It is an arithmetic number, because the mean of its divisors is an integer number (180012168).

Almost surely, 2^1211510252 is an apocalyptic number.

It is an amenable number.

1211510252 is a deficient number, since it is larger than the sum of its proper divisors (948635764).

1211510252 is a wasteful number, since it uses less digits than its factorization.

1211510252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5714728 (or 5714726 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 20.

The square root of 1211510252 is about 34806.7558384863. The cubic root of 1211510252 is about 1066.0453934654.

Adding to 1211510252 its reverse (2520151121), we get a palindrome (3731661373).

The spelling of 1211510252 in words is "one billion, two hundred eleven million, five hundred ten thousand, two hundred fifty-two".