1213133401 has 4 divisors (see below), whose sum is σ = 1228489600. Its totient is φ = 1197777204.

The previous prime is 1213133381. The next prime is 1213133417. The reversal of 1213133401 is 1043313121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1213133401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1213113401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7677981 + ... + 7678138.

It is an arithmetic number, because the mean of its divisors is an integer number (307122400).

Almost surely, 2^1213133401 is an apocalyptic number.

It is an amenable number.

1213133401 is a deficient number, since it is larger than the sum of its proper divisors (15356199).

1213133401 is an equidigital number, since it uses as much as digits as its factorization.

1213133401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15356198.

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

The square root of 1213133401 is about 34830.0646137787. The cubic root of 1213133401 is about 1066.5212673666.

Adding to 1213133401 its reverse (1043313121), we get a palindrome (2256446522).

The spelling of 1213133401 in words is "one billion, two hundred thirteen million, one hundred thirty-three thousand, four hundred one".