10221121219997 has 2 divisors, whose sum is σ = 10221121219998. Its totient is φ = 10221121219996.

The previous prime is 10221121219987. The next prime is 10221121220003. The reversal of 10221121219997 is 79991212112201.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8934754679236 + 1286366540761 = 2989106^2 + 1134181^2 .

It is a cyclic number.

It is not a de Polignac number, because 10221121219997 - 2¹² = 10221121215901 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10221121219927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5110560609998 + 5110560609999.

It is an arithmetic number, because the mean of its divisors is an integer number (5110560609999).

Almost surely, 2^{10221121219997} is an apocalyptic number.

It is an amenable number.

10221121219997 is a deficient number, since it is larger than the sum of its proper divisors (1).

10221121219997 is an equidigital number, since it uses as much as digits as its factorization.

10221121219997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 81648, while the sum is 47.

The spelling of 10221121219997 in words is "ten trillion, two hundred twenty-one billion, one hundred twenty-one million, two hundred nineteen thousand, nine hundred ninety-seven".