20422015211281 has 2 divisors, whose sum is σ = 20422015211282. Its totient is φ = 20422015211280.

The previous prime is 20422015211243. The next prime is 20422015211363. The reversal of 20422015211281 is 18211251022402.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20399088406225 + 22926805056 = 4516535^2 + 151416^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20422015211281 is a prime.

It is a super-2 number, since 2×20422015211281² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20422015217281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10211007605640 + 10211007605641.

It is an arithmetic number, because the mean of its divisors is an integer number (10211007605641).

Almost surely, 2^{20422015211281} is an apocalyptic number.

It is an amenable number.

20422015211281 is a deficient number, since it is larger than the sum of its proper divisors (1).

20422015211281 is an equidigital number, since it uses as much as digits as its factorization.

20422015211281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5120, while the sum is 31.

Adding to 20422015211281 its reverse (18211251022402), we get a palindrome (38633266233683).

The spelling of 20422015211281 in words is "twenty trillion, four hundred twenty-two billion, fifteen million, two hundred eleven thousand, two hundred eighty-one".