910201021101221 has 2 divisors, whose sum is σ = 910201021101222. Its totient is φ = 910201021101220.

The previous prime is 910201021101139. The next prime is 910201021101223. The reversal of 910201021101221 is 122101120102019.

It is a happy number.

910201021101221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 787279141665025 + 122921879436196 = 28058495^2 + 11087014^2 .

It is an emirp because it is prime and its reverse (122101120102019) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 910201021101221 - 2²⁶ = 910200953992357 is a prime.

It is a super-2 number, since 2×910201021101221² (a number of 31 digits) contains 22 as substring.

Together with 910201021101223, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (910201021101223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 455100510550610 + 455100510550611.

It is an arithmetic number, because the mean of its divisors is an integer number (455100510550611).

Almost surely, 2^{910201021101221} is an apocalyptic number.

It is an amenable number.

910201021101221 is a deficient number, since it is larger than the sum of its proper divisors (1).

910201021101221 is an equidigital number, since it uses as much as digits as its factorization.

910201021101221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 23.

The spelling of 910201021101221 in words is "nine hundred ten trillion, two hundred one billion, twenty-one million, one hundred one thousand, two hundred twenty-one".