10220991497 has 2 divisors, whose sum is σ = 10220991498. Its totient is φ = 10220991496.

The previous prime is 10220991479. The next prime is 10220991509. The reversal of 10220991497 is 79419902201.

Together with previous prime (10220991479) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9646382656 + 574608841 = 98216^2 + 23971^2 .

It is a cyclic number.

It is not a de Polignac number, because 10220991497 - 2³⁰ = 9147249673 is a prime.

It is not a weakly prime, because it can be changed into another prime (10220991467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5110495748 + 5110495749.

It is an arithmetic number, because the mean of its divisors is an integer number (5110495749).

Almost surely, 2^10220991497 is an apocalyptic number.

It is an amenable number.

10220991497 is a deficient number, since it is larger than the sum of its proper divisors (1).

10220991497 is an equidigital number, since it uses as much as digits as its factorization.

10220991497 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 81648, while the sum is 44.

The spelling of 10220991497 in words is "ten billion, two hundred twenty million, nine hundred ninety-one thousand, four hundred ninety-seven".