10221101999951 has 2 divisors, whose sum is σ = 10221101999952. Its totient is φ = 10221101999950.

The previous prime is 10221101999923. The next prime is 10221102000077. The reversal of 10221101999951 is 15999910112201.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (15999910112201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 10221101999951 - 2⁴² = 5823055488847 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 10221101999951.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10221101999051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5110550999975 + 5110550999976.

It is an arithmetic number, because the mean of its divisors is an integer number (5110550999976).

Almost surely, 2^{10221101999951} is an apocalyptic number.

10221101999951 is a deficient number, since it is larger than the sum of its proper divisors (1).

10221101999951 is an equidigital number, since it uses as much as digits as its factorization.

10221101999951 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 131220, while the sum is 50.

The spelling of 10221101999951 in words is "ten trillion, two hundred twenty-one billion, one hundred one million, nine hundred ninety-nine thousand, nine hundred fifty-one".