2220100220981 has 2 divisors, whose sum is σ = 2220100220982. Its totient is φ = 2220100220980.

The previous prime is 2220100220909. The next prime is 2220100221047. The reversal of 2220100220981 is 1890220010222.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2140562120356 + 79538100625 = 1463066^2 + 282025^2 .

It is a cyclic number.

It is not a de Polignac number, because 2220100220981 - 2²² = 2220096026677 is a prime.

It is a super-2 number, since 2×2220100220981² (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 (2220100220281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1110050110490 + 1110050110491.

It is an arithmetic number, because the mean of its divisors is an integer number (1110050110491).

Almost surely, 2^{2220100220981} is an apocalyptic number.

It is an amenable number.

2220100220981 is a deficient number, since it is larger than the sum of its proper divisors (1).

2220100220981 is an equidigital number, since it uses as much as digits as its factorization.

2220100220981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2304, while the sum is 29.

The spelling of 2220100220981 in words is "two trillion, two hundred twenty billion, one hundred million, two hundred twenty thousand, nine hundred eighty-one".