202221011203921 has 2 divisors, whose sum is σ = 202221011203922. Its totient is φ = 202221011203920.

The previous prime is 202221011203879. The next prime is 202221011203931. The reversal of 202221011203921 is 129302110122202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 179990021953296 + 22230989250625 = 13416036^2 + 4714975^2 .

It is a cyclic number.

It is not a de Polignac number, because 202221011203921 - 2⁷ = 202221011203793 is a prime.

It is a super-3 number, since 3×202221011203921³ (a number of 44 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 202221011203921.

It is not a weakly prime, because it can be changed into another prime (202221011203931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101110505601960 + 101110505601961.

It is an arithmetic number, because the mean of its divisors is an integer number (101110505601961).

Almost surely, 2^{202221011203921} is an apocalyptic number.

It is an amenable number.

202221011203921 is a deficient number, since it is larger than the sum of its proper divisors (1).

202221011203921 is an equidigital number, since it uses as much as digits as its factorization.

202221011203921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 28.

The spelling of 202221011203921 in words is "two hundred two trillion, two hundred twenty-one billion, eleven million, two hundred three thousand, nine hundred twenty-one".