22020100981 has 2 divisors, whose sum is σ = 22020100982. Its totient is φ = 22020100980.

The previous prime is 22020100967. The next prime is 22020101011. The reversal of 22020100981 is 18900102022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21983992900 + 36108081 = 148270^2 + 6009^2 .

It is a cyclic number.

It is not a de Polignac number, because 22020100981 - 2²¹ = 22018003829 is a prime.

It is a super-2 number, since 2×22020100981² (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 (22020100951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11010050490 + 11010050491.

It is an arithmetic number, because the mean of its divisors is an integer number (11010050491).

Almost surely, 2^22020100981 is an apocalyptic number.

It is an amenable number.

22020100981 is a deficient number, since it is larger than the sum of its proper divisors (1).

22020100981 is an equidigital number, since it uses as much as digits as its factorization.

22020100981 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.

The spelling of 22020100981 in words is "twenty-two billion, twenty million, one hundred thousand, nine hundred eighty-one".