1001221301231 has 4 divisors (see below), whose sum is σ = 1001229996000. Its totient is φ = 1001212606464.

The previous prime is 1001221301207. The next prime is 1001221301239. The reversal of 1001221301231 is 1321031221001.

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 1001221301231 - 2¹⁸ = 1001221039087 is a prime.

It is a super-2 number, since 2×1001221301231² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001221301239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4172306 + ... + 4405743.

It is an arithmetic number, because the mean of its divisors is an integer number (250307499000).

Almost surely, 2^{1001221301231} is an apocalyptic number.

1001221301231 is a deficient number, since it is larger than the sum of its proper divisors (8694769).

1001221301231 is an equidigital number, since it uses as much as digits as its factorization.

1001221301231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8694768.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 1001221301231 its reverse (1321031221001), we get a palindrome (2322252522232).

The spelling of 1001221301231 in words is "one trillion, one billion, two hundred twenty-one million, three hundred one thousand, two hundred thirty-one".