10221217931 has 2 divisors, whose sum is σ = 10221217932. Its totient is φ = 10221217930.

The previous prime is 10221217927. The next prime is 10221217961. The reversal of 10221217931 is 13971212201.

It is a weak prime.

It is an emirp because it is prime and its reverse (13971212201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 10221217931 - 2² = 10221217927 is a prime.

It is a super-2 number, since 2×10221217931² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 10221217894 and 10221217903.

It is not a weakly prime, because it can be changed into another prime (10221217961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5110608965 + 5110608966.

It is an arithmetic number, because the mean of its divisors is an integer number (5110608966).

Almost surely, 2^10221217931 is an apocalyptic number.

10221217931 is a deficient number, since it is larger than the sum of its proper divisors (1).

10221217931 is an equidigital number, since it uses as much as digits as its factorization.

10221217931 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1512, while the sum is 29.

The spelling of 10221217931 in words is "ten billion, two hundred twenty-one million, two hundred seventeen thousand, nine hundred thirty-one".