221002020201971 has 2 divisors, whose sum is σ = 221002020201972. Its totient is φ = 221002020201970.

The previous prime is 221002020201967. The next prime is 221002020202031. The reversal of 221002020201971 is 179102020200122.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 221002020201971 - 2² = 221002020201967 is a prime.

It is not a weakly prime, because it can be changed into another prime (221002020201901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110501010100985 + 110501010100986.

It is an arithmetic number, because the mean of its divisors is an integer number (110501010100986).

Almost surely, 2^{221002020201971} is an apocalyptic number.

221002020201971 is a deficient number, since it is larger than the sum of its proper divisors (1).

221002020201971 is an equidigital number, since it uses as much as digits as its factorization.

221002020201971 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2016, while the sum is 29.

The spelling of 221002020201971 in words is "two hundred twenty-one trillion, two billion, twenty million, two hundred one thousand, nine hundred seventy-one".