221002101219971 has 2 divisors, whose sum is σ = 221002101219972. Its totient is φ = 221002101219970.

The previous prime is 221002101219959. The next prime is 221002101220091. The reversal of 221002101219971 is 179912101200122.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221002101219971 is a prime.

It is not a weakly prime, because it can be changed into another prime (221002101219371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110501050609985 + 110501050609986.

It is an arithmetic number, because the mean of its divisors is an integer number (110501050609986).

Almost surely, 2^{221002101219971} is an apocalyptic number.

221002101219971 is a deficient number, since it is larger than the sum of its proper divisors (1).

221002101219971 is an equidigital number, since it uses as much as digits as its factorization.

221002101219971 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9072, while the sum is 38.

The spelling of 221002101219971 in words is "two hundred twenty-one trillion, two billion, one hundred one million, two hundred nineteen thousand, nine hundred seventy-one".