10221772499 has 2 divisors, whose sum is σ = 10221772500. Its totient is φ = 10221772498.

The previous prime is 10221772489. The next prime is 10221772531. The reversal of 10221772499 is 99427712201.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10221772499 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (10221772489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5110886249 + 5110886250.

It is an arithmetic number, because the mean of its divisors is an integer number (5110886250).

Almost surely, 2^10221772499 is an apocalyptic number.

10221772499 is a deficient number, since it is larger than the sum of its proper divisors (1).

10221772499 is an equidigital number, since it uses as much as digits as its factorization.

10221772499 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 127008, while the sum is 44.

The spelling of 10221772499 in words is "ten billion, two hundred twenty-one million, seven hundred seventy-two thousand, four hundred ninety-nine".