10221031391 has 4 divisors (see below), whose sum is σ = 10438500192. Its totient is φ = 10003562592.

The previous prime is 10221031319. The next prime is 10221031423. The reversal of 10221031391 is 19313012201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19313012201 = 7 ⋅2759001743.

It is a cyclic number.

It is not a de Polignac number, because 10221031391 - 2²² = 10216837087 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10221033391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 108734330 + ... + 108734423.

It is an arithmetic number, because the mean of its divisors is an integer number (2609625048).

Almost surely, 2^10221031391 is an apocalyptic number.

10221031391 is a deficient number, since it is larger than the sum of its proper divisors (217468801).

10221031391 is an equidigital number, since it uses as much as digits as its factorization.

10221031391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217468800.

The product of its (nonzero) digits is 324, while the sum is 23.

Adding to 10221031391 its reverse (19313012201), we get a palindrome (29534043592).

The spelling of 10221031391 in words is "ten billion, two hundred twenty-one million, thirty-one thousand, three hundred ninety-one".