10201121221091 has 2 divisors, whose sum is σ = 10201121221092. Its totient is φ = 10201121221090.

The previous prime is 10201121221073. The next prime is 10201121221127. The reversal of 10201121221091 is 19012212110201.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 10201121221091 - 2¹⁰ = 10201121220067 is a prime.

It is not a weakly prime, because it can be changed into another prime (10201121221051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5100560610545 + 5100560610546.

It is an arithmetic number, because the mean of its divisors is an integer number (5100560610546).

Almost surely, 2^{10201121221091} is an apocalyptic number.

10201121221091 is a deficient number, since it is larger than the sum of its proper divisors (1).

10201121221091 is an equidigital number, since it uses as much as digits as its factorization.

10201121221091 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.

Adding to 10201121221091 its reverse (19012212110201), we get a palindrome (29213333331292).

The spelling of 10201121221091 in words is "ten trillion, two hundred one billion, one hundred twenty-one million, two hundred twenty-one thousand, ninety-one".