10221770731 has 4 divisors (see below), whose sum is σ = 10222383600. Its totient is φ = 10221157864.

The previous prime is 10221770723. The next prime is 10221770743. The reversal of 10221770731 is 13707712201.

It is a happy number.

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 10221770731 - 2³ = 10221770723 is a prime.

It is a super-2 number, since 2×10221770731² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10221770693 and 10221770702.

It is not an unprimeable number, because it can be changed into a prime (10221770711) 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, 280696 + ... + 315013.

It is an arithmetic number, because the mean of its divisors is an integer number (2555595900).

Almost surely, 2^10221770731 is an apocalyptic number.

10221770731 is a deficient number, since it is larger than the sum of its proper divisors (612869).

10221770731 is an equidigital number, since it uses as much as digits as its factorization.

10221770731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 612868.

The product of its (nonzero) digits is 4116, while the sum is 31.

The spelling of 10221770731 in words is "ten billion, two hundred twenty-one million, seven hundred seventy thousand, seven hundred thirty-one".