20000122109971 has 2 divisors, whose sum is σ = 20000122109972. Its totient is φ = 20000122109970.

The previous prime is 20000122109969. The next prime is 20000122110079. The reversal of 20000122109971 is 17990122100002.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20000122109971 - 2¹ = 20000122109969 is a prime.

Together with 20000122109969, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (20000122109171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10000061054985 + 10000061054986.

It is an arithmetic number, because the mean of its divisors is an integer number (10000061054986).

Almost surely, 2^{20000122109971} is an apocalyptic number.

20000122109971 is a deficient number, since it is larger than the sum of its proper divisors (1).

20000122109971 is an equidigital number, since it uses as much as digits as its factorization.

20000122109971 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4536, while the sum is 34.

Adding to 20000122109971 its reverse (17990122100002), we get a palindrome (37990244209973).

The spelling of 20000122109971 in words is "twenty trillion, one hundred twenty-two million, one hundred nine thousand, nine hundred seventy-one".