2000220200981 has 2 divisors, whose sum is σ = 2000220200982. Its totient is φ = 2000220200980.

The previous prime is 2000220200971. The next prime is 2000220201053. The reversal of 2000220200981 is 1890020220002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1374920404900 + 625299796081 = 1172570^2 + 790759^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2000220200981 is a prime.

It is a super-2 number, since 2×2000220200981² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2000220200981.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2000220200911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1000110100490 + 1000110100491.

It is an arithmetic number, because the mean of its divisors is an integer number (1000110100491).

Almost surely, 2^{2000220200981} is an apocalyptic number.

It is an amenable number.

2000220200981 is a deficient number, since it is larger than the sum of its proper divisors (1).

2000220200981 is an equidigital number, since it uses as much as digits as its factorization.

2000220200981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 26.

Adding to 2000220200981 its reverse (1890020220002), we get a palindrome (3890240420983).

The spelling of 2000220200981 in words is "two trillion, two hundred twenty million, two hundred thousand, nine hundred eighty-one".