10221313221731 has 2 divisors, whose sum is σ = 10221313221732. Its totient is φ = 10221313221730.

The previous prime is 10221313221629. The next prime is 10221313221811. The reversal of 10221313221731 is 13712231312201.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10221313221731 is a prime.

It is a super-2 number, since 2×10221313221731² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 10221313221694 and 10221313221703.

It is not a weakly prime, because it can be changed into another prime (10221313229731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5110656610865 + 5110656610866.

It is an arithmetic number, because the mean of its divisors is an integer number (5110656610866).

Almost surely, 2^{10221313221731} is an apocalyptic number.

10221313221731 is a deficient number, since it is larger than the sum of its proper divisors (1).

10221313221731 is an equidigital number, since it uses as much as digits as its factorization.

10221313221731 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3024, while the sum is 29.

Adding to 10221313221731 its reverse (13712231312201), we get a palindrome (23933544533932).

The spelling of 10221313221731 in words is "ten trillion, two hundred twenty-one billion, three hundred thirteen million, two hundred twenty-one thousand, seven hundred thirty-one".