20221201081 has 2 divisors, whose sum is σ = 20221201082. Its totient is φ = 20221201080.

The previous prime is 20221201031. The next prime is 20221201129. The reversal of 20221201081 is 18010212202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19886640400 + 334560681 = 141020^2 + 18291^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20221201081 is a prime.

It is a super-2 number, since 2×20221201081² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20221201031) 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, 10110600540 + 10110600541.

It is an arithmetic number, because the mean of its divisors is an integer number (10110600541).

Almost surely, 2^20221201081 is an apocalyptic number.

It is an amenable number.

20221201081 is a deficient number, since it is larger than the sum of its proper divisors (1).

20221201081 is an equidigital number, since it uses as much as digits as its factorization.

20221201081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 20221201081 its reverse (18010212202), we get a palindrome (38231413283).

The spelling of 20221201081 in words is "twenty billion, two hundred twenty-one million, two hundred one thousand, eighty-one".