20201212122001 has 2 divisors, whose sum is σ = 20201212122002. Its totient is φ = 20201212122000.

The previous prime is 20201212121971. The next prime is 20201212122017. The reversal of 20201212122001 is 10022121210202.

It is a happy number.

It is an a-pointer prime, because the next prime (20201212122017) can be obtained adding 20201212122001 to its sum of digits (16).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18917489131776 + 1283722990225 = 4349424^2 + 1133015^2 .

It is a cyclic number.

It is not a de Polignac number, because 20201212122001 - 2⁵ = 20201212121969 is a prime.

It is not a weakly prime, because it can be changed into another prime (20201212152001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10100606061000 + 10100606061001.

It is an arithmetic number, because the mean of its divisors is an integer number (10100606061001).

Almost surely, 2^{20201212122001} is an apocalyptic number.

It is an amenable number.

20201212122001 is a deficient number, since it is larger than the sum of its proper divisors (1).

20201212122001 is an equidigital number, since it uses as much as digits as its factorization.

20201212122001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 20201212122001 its reverse (10022121210202), we get a palindrome (30223333332203).

The spelling of 20201212122001 in words is "twenty trillion, two hundred one billion, two hundred twelve million, one hundred twenty-two thousand, one".