10221201001997 has 2 divisors, whose sum is σ = 10221201001998. Its totient is φ = 10221201001996.

The previous prime is 10221201001889. The next prime is 10221201002029. The reversal of 10221201001997 is 79910010212201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6658975089001 + 3562225912996 = 2580499^2 + 1887386^2 .

It is a cyclic number.

It is not a de Polignac number, because 10221201001997 - 2²⁰ = 10221199953421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10221201009997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5110600500998 + 5110600500999.

It is an arithmetic number, because the mean of its divisors is an integer number (5110600500999).

Almost surely, 2^{10221201001997} is an apocalyptic number.

It is an amenable number.

10221201001997 is a deficient number, since it is larger than the sum of its proper divisors (1).

10221201001997 is an equidigital number, since it uses as much as digits as its factorization.

10221201001997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4536, while the sum is 35.

The spelling of 10221201001997 in words is "ten trillion, two hundred twenty-one billion, two hundred one million, one thousand, nine hundred ninety-seven".