1213231001 has 8 divisors (see below), whose sum is σ = 1233108360. Its totient is φ = 1193492608.

The previous prime is 1213230989. The next prime is 1213231009. The reversal of 1213231001 is 1001323121.

It can be written as a sum of positive squares in 4 ways, for example, as 582015625 + 631215376 = 24125^2 + 25124^2 .

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 1213231001 - 2¹⁰ = 1213229977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1213231009) 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, 17066 + ... + 52131.

It is an arithmetic number, because the mean of its divisors is an integer number (154138545).

Almost surely, 2^1213231001 is an apocalyptic number.

It is an amenable number.

1213231001 is a deficient number, since it is larger than the sum of its proper divisors (19877359).

1213231001 is an equidigital number, since it uses as much as digits as its factorization.

1213231001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69483.

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

The square root of 1213231001 is about 34831.4656740138. The cubic root of 1213231001 is about 1066.5498681465.

Adding to 1213231001 its reverse (1001323121), we get a palindrome (2214554122).

The spelling of 1213231001 in words is "one billion, two hundred thirteen million, two hundred thirty-one thousand, one".