220200021971 has 2 divisors, whose sum is σ = 220200021972. Its totient is φ = 220200021970.

The previous prime is 220200021947. The next prime is 220200022001. The reversal of 220200021971 is 179120002022.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 220200021971 - 2⁶ = 220200021907 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 220200021971.

It is not a weakly prime, because it can be changed into another prime (220200021901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110100010985 + 110100010986.

It is an arithmetic number, because the mean of its divisors is an integer number (110100010986).

Almost surely, 2^220200021971 is an apocalyptic number.

220200021971 is a deficient number, since it is larger than the sum of its proper divisors (1).

220200021971 is an equidigital number, since it uses as much as digits as its factorization.

220200021971 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1008, while the sum is 26.

Adding to 220200021971 its reverse (179120002022), we get a palindrome (399320023993).

The spelling of 220200021971 in words is "two hundred twenty billion, two hundred million, twenty-one thousand, nine hundred seventy-one".