1213133320 has 32 divisors (see below), whose sum is σ = 3119486400. Its totient is φ = 415931328.

The previous prime is 1213133303. The next prime is 1213133333. The reversal of 1213133320 is 233313121.

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, 2166030 + ... + 2166589.

It is an arithmetic number, because the mean of its divisors is an integer number (97483950).

Almost surely, 2^1213133320 is an apocalyptic number.

1213133320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1213133320 is an abundant number, since it is smaller than the sum of its proper divisors (1906353080).

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

1213133320 is a wasteful number, since it uses less digits than its factorization.

1213133320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4332637 (or 4332633 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 19.

The square root of 1213133320 is about 34830.0634509902. The cubic root of 1213133320 is about 1066.5212436296.

Adding to 1213133320 its reverse (233313121), we get a palindrome (1446446441).

It can be divided in two parts, 12131 and 33320, that added together give a triangular number (45451 = T₃₀₁).

The spelling of 1213133320 in words is "one billion, two hundred thirteen million, one hundred thirty-three thousand, three hundred twenty".