1213312001 has 8 divisors (see below), whose sum is σ = 1324523424. Its totient is φ = 1102252320.

The previous prime is 1213311989. The next prime is 1213312019. The reversal of 1213312001 is 1002133121.

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 1213312001 - 2²² = 1209117697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1213312081) 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, 20876 + ... + 53501.

It is an arithmetic number, because the mean of its divisors is an integer number (165565428).

Almost surely, 2^1213312001 is an apocalyptic number.

1213312001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1213312001 is a deficient number, since it is larger than the sum of its proper divisors (111211423).

1213312001 is a wasteful number, since it uses less digits than its factorization.

1213312001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75871.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 1213312001 is about 34832.6283963757. The cubic root of 1213312001 is about 1066.5736032848.

Adding to 1213312001 its reverse (1002133121), we get a palindrome (2215445122).

The spelling of 1213312001 in words is "one billion, two hundred thirteen million, three hundred twelve thousand, one".