2220002101981 has 2 divisors, whose sum is σ = 2220002101982. Its totient is φ = 2220002101980.

The previous prime is 2220002101973. The next prime is 2220002102047. The reversal of 2220002101981 is 1891012000222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1304698510756 + 915303591225 = 1142234^2 + 956715^2 .

It is a cyclic number.

It is not a de Polignac number, because 2220002101981 - 2³ = 2220002101973 is a prime.

It is a super-2 number, since 2×2220002101981² (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 (2220002101901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1110001050990 + 1110001050991.

It is an arithmetic number, because the mean of its divisors is an integer number (1110001050991).

Almost surely, 2^{2220002101981} is an apocalyptic number.

It is an amenable number.

2220002101981 is a deficient number, since it is larger than the sum of its proper divisors (1).

2220002101981 is an equidigital number, since it uses as much as digits as its factorization.

2220002101981 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 28.

The spelling of 2220002101981 in words is "two trillion, two hundred twenty billion, two million, one hundred one thousand, nine hundred eighty-one".