1213031001 has 32 divisors (see below), whose sum is σ = 1992567808. Its totient is φ = 639213120.

The previous prime is 1213030997. The next prime is 1213031059. The reversal of 1213031001 is 1001303121.

It is not a de Polignac number, because 1213031001 - 2² = 1213030997 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1213031101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 442806 + ... + 445536.

It is an arithmetic number, because the mean of its divisors is an integer number (62267744).

Almost surely, 2^1213031001 is an apocalyptic number.

It is an amenable number.

1213031001 is a deficient number, since it is larger than the sum of its proper divisors (779536807).

1213031001 is a wasteful number, since it uses less digits than its factorization.

1213031001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4381.

The product of its (nonzero) digits is 18, while the sum is 12.

The square root of 1213031001 is about 34828.5945883551. The cubic root of 1213031001 is about 1066.4912583418.

Adding to 1213031001 its reverse (1001303121), we get a palindrome (2214334122).

The spelling of 1213031001 in words is "one billion, two hundred thirteen million, thirty-one thousand, one".