1001211313331 has 4 divisors (see below), whose sum is σ = 1001288336664. Its totient is φ = 1001134290000.

The previous prime is 1001211313321. The next prime is 1001211313369. The reversal of 1001211313331 is 1333131121001.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1001211313331 - 2³⁸ = 726333406387 is a prime.

It is a super-2 number, since 2×1001211313331² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1001211313321) 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, 38492165 + ... + 38518166.

It is an arithmetic number, because the mean of its divisors is an integer number (250322084166).

Almost surely, 2^{1001211313331} is an apocalyptic number.

1001211313331 is a deficient number, since it is larger than the sum of its proper divisors (77023333).

1001211313331 is an equidigital number, since it uses as much as digits as its factorization.

1001211313331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77023332.

The product of its (nonzero) digits is 162, while the sum is 20.

Adding to 1001211313331 its reverse (1333131121001), we get a palindrome (2334342434332).

The spelling of 1001211313331 in words is "one trillion, one billion, two hundred eleven million, three hundred thirteen thousand, three hundred thirty-one".