10101221010091 has 2 divisors, whose sum is σ = 10101221010092. Its totient is φ = 10101221010090.

The previous prime is 10101221010061. The next prime is 10101221010137. The reversal of 10101221010091 is 19001012210101.

It is a weak prime.

It is an emirp because it is prime and its reverse (19001012210101) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 10101221010091 - 2²⁹ = 10100684139179 is a prime.

It is not a weakly prime, because it can be changed into another prime (10101221010061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5050610505045 + 5050610505046.

It is an arithmetic number, because the mean of its divisors is an integer number (5050610505046).

Almost surely, 2^{10101221010091} is an apocalyptic number.

10101221010091 is a deficient number, since it is larger than the sum of its proper divisors (1).

10101221010091 is an equidigital number, since it uses as much as digits as its factorization.

10101221010091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 19.

Adding to 10101221010091 its reverse (19001012210101), we get a palindrome (29102233220192).

The spelling of 10101221010091 in words is "ten trillion, one hundred one billion, two hundred twenty-one million, ten thousand, ninety-one".