10002220981 has 2 divisors, whose sum is σ = 10002220982. Its totient is φ = 10002220980.

The previous prime is 10002220961. The next prime is 10002221039. The reversal of 10002220981 is 18902220001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8536096881 + 1466124100 = 92391^2 + 38290^2 .

It is a cyclic number.

It is not a de Polignac number, because 10002220981 - 2¹³ = 10002212789 is a prime.

It is a super-2 number, since 2×10002220981² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10002220951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5001110490 + 5001110491.

It is an arithmetic number, because the mean of its divisors is an integer number (5001110491).

Almost surely, 2^10002220981 is an apocalyptic number.

It is an amenable number.

10002220981 is a deficient number, since it is larger than the sum of its proper divisors (1).

10002220981 is an equidigital number, since it uses as much as digits as its factorization.

10002220981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 25.

Adding to 10002220981 its reverse (18902220001), we get a palindrome (28904440982).

The spelling of 10002220981 in words is "ten billion, two million, two hundred twenty thousand, nine hundred eighty-one".