1213132321 has 8 divisors (see below), whose sum is σ = 1264849920. Its totient is φ = 1162073808.

The previous prime is 1213132301. The next prime is 1213132337. The reversal of 1213132321 is 1232313121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1213132321 - 2⁹ = 1213131809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1213132301) 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, 161011 + ... + 168376.

It is an arithmetic number, because the mean of its divisors is an integer number (158106240).

Almost surely, 2^1213132321 is an apocalyptic number.

It is an amenable number.

1213132321 is a deficient number, since it is larger than the sum of its proper divisors (51717599).

1213132321 is a wasteful number, since it uses less digits than its factorization.

1213132321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 329543.

The product of its digits is 216, while the sum is 19.

The square root of 1213132321 is about 34830.0491099281. The cubic root of 1213132321 is about 1066.5209508740.

Adding to 1213132321 its reverse (1232313121), we get a palindrome (2445445442).

The spelling of 1213132321 in words is "one billion, two hundred thirteen million, one hundred thirty-two thousand, three hundred twenty-one".