10221221200999 has 2 divisors, whose sum is σ = 10221221201000. Its totient is φ = 10221221200998.

The previous prime is 10221221200991. The next prime is 10221221201033. The reversal of 10221221200999 is 99900212212201.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 10221221200999 - 2³ = 10221221200991 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10221221200991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5110610600499 + 5110610600500.

It is an arithmetic number, because the mean of its divisors is an integer number (5110610600500).

Almost surely, 2^{10221221200999} is an apocalyptic number.

10221221200999 is a deficient number, since it is larger than the sum of its proper divisors (1).

10221221200999 is an equidigital number, since it uses as much as digits as its factorization.

10221221200999 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23328, while the sum is 40.

The spelling of 10221221200999 in words is "ten trillion, two hundred twenty-one billion, two hundred twenty-one million, two hundred thousand, nine hundred ninety-nine".