20122001210177 has 2 divisors, whose sum is σ = 20122001210178. Its totient is φ = 20122001210176.

The previous prime is 20122001210173. The next prime is 20122001210183. The reversal of 20122001210177 is 77101210022102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18012291439921 + 2109709770256 = 4244089^2 + 1452484^2 .

It is a cyclic number.

It is not a de Polignac number, because 20122001210177 - 2² = 20122001210173 is a prime.

It is a super-3 number, since 3×20122001210177³ (a number of 41 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (20122001210173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10061000605088 + 10061000605089.

It is an arithmetic number, because the mean of its divisors is an integer number (10061000605089).

Almost surely, 2^{20122001210177} is an apocalyptic number.

It is an amenable number.

20122001210177 is a deficient number, since it is larger than the sum of its proper divisors (1).

20122001210177 is an equidigital number, since it uses as much as digits as its factorization.

20122001210177 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 784, while the sum is 26.

Adding to 20122001210177 its reverse (77101210022102), we get a palindrome (97223211232279).

The spelling of 20122001210177 in words is "twenty trillion, one hundred twenty-two billion, one million, two hundred ten thousand, one hundred seventy-seven".