10221838491 has 4 divisors (see below), whose sum is σ = 13629117992. Its totient is φ = 6814558992.

The previous prime is 10221838483. The next prime is 10221838493. The reversal of 10221838491 is 19483812201.

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

It is not a de Polignac number, because 10221838491 - 2³ = 10221838483 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10221838493) 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, 1703639746 + ... + 1703639751.

It is an arithmetic number, because the mean of its divisors is an integer number (3407279498).

Almost surely, 2^10221838491 is an apocalyptic number.

10221838491 is a deficient number, since it is larger than the sum of its proper divisors (3407279501).

10221838491 is an equidigital number, since it uses as much as digits as its factorization.

10221838491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3407279500.

The product of its (nonzero) digits is 27648, while the sum is 39.

The spelling of 10221838491 in words is "ten billion, two hundred twenty-one million, eight hundred thirty-eight thousand, four hundred ninety-one".