1213320252 has 24 divisors (see below), whose sum is σ = 2836508416. Its totient is φ = 403664688.

The previous prime is 1213320233. The next prime is 1213320271. The reversal of 1213320252 is 2520233121.

It is an interprime number because it is at equal distance from previous prime (1213320233) and next prime (1213320271).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 90388 + ... + 102939.

Almost surely, 2^1213320252 is an apocalyptic number.

1213320252 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1213320252 is an abundant number, since it is smaller than the sum of its proper divisors (1623188164).

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

1213320252 is a wasteful number, since it uses less digits than its factorization.

1213320252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193857 (or 193855 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 1213320252 is about 34832.7468339779. The cubic root of 1213320252 is about 1066.5760209864.

Adding to 1213320252 its reverse (2520233121), we get a palindrome (3733553373).

It can be divided in two parts, 12133 and 20252, that added together give a triangular number (32385 = T₂₅₄).

The spelling of 1213320252 in words is "one billion, two hundred thirteen million, three hundred twenty thousand, two hundred fifty-two".