20010121212241 has 2 divisors, whose sum is σ = 20010121212242. Its totient is φ = 20010121212240.

The previous prime is 20010121212223. The next prime is 20010121212437. The reversal of 20010121212241 is 14221212101002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13628434772241 + 6381686440000 = 3691671^2 + 2526200^2 .

It is a cyclic number.

It is not a de Polignac number, because 20010121212241 - 2²⁷ = 20009986994513 is a prime.

It is not a weakly prime, because it can be changed into another prime (20010121212041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10005060606120 + 10005060606121.

It is an arithmetic number, because the mean of its divisors is an integer number (10005060606121).

Almost surely, 2^{20010121212241} is an apocalyptic number.

It is an amenable number.

20010121212241 is a deficient number, since it is larger than the sum of its proper divisors (1).

20010121212241 is an equidigital number, since it uses as much as digits as its factorization.

20010121212241 is an evil number, because the sum of its binary digits is even.

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

Adding to 20010121212241 its reverse (14221212101002), we get a palindrome (34231333313243).

The spelling of 20010121212241 in words is "twenty trillion, ten billion, one hundred twenty-one million, two hundred twelve thousand, two hundred forty-one".