221000201010971 has 2 divisors, whose sum is σ = 221000201010972. Its totient is φ = 221000201010970.

The previous prime is 221000201010961. The next prime is 221000201011001. The reversal of 221000201010971 is 179010102000122.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 221000201010971 - 2¹⁸ = 221000200748827 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 221000201010971.

It is not a weakly prime, because it can be changed into another prime (221000201010961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110500100505485 + 110500100505486.

It is an arithmetic number, because the mean of its divisors is an integer number (110500100505486).

Almost surely, 2^{221000201010971} is an apocalyptic number.

221000201010971 is a deficient number, since it is larger than the sum of its proper divisors (1).

221000201010971 is an equidigital number, since it uses as much as digits as its factorization.

221000201010971 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 504, while the sum is 26.

The spelling of 221000201010971 in words is "two hundred twenty-one trillion, two hundred one million, ten thousand, nine hundred seventy-one".