2001202210981 has 2 divisors, whose sum is σ = 2001202210982. Its totient is φ = 2001202210980.

The previous prime is 2001202210951. The next prime is 2001202211053. The reversal of 2001202210981 is 1890122021002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1551853198756 + 449349012225 = 1245734^2 + 670335^2 .

It is a cyclic number.

It is not a de Polignac number, because 2001202210981 - 2⁵ = 2001202210949 is a prime.

It is a super-2 number, since 2×2001202210981² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2001202210901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1000601105490 + 1000601105491.

It is an arithmetic number, because the mean of its divisors is an integer number (1000601105491).

Almost surely, 2^{2001202210981} is an apocalyptic number.

It is an amenable number.

2001202210981 is a deficient number, since it is larger than the sum of its proper divisors (1).

2001202210981 is an equidigital number, since it uses as much as digits as its factorization.

2001202210981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 28.

Adding to 2001202210981 its reverse (1890122021002), we get a palindrome (3891324231983).

The spelling of 2001202210981 in words is "two trillion, one billion, two hundred two million, two hundred ten thousand, nine hundred eighty-one".