101211201120091 has 2 divisors, whose sum is σ = 101211201120092. Its totient is φ = 101211201120090.

The previous prime is 101211201120077. The next prime is 101211201120151. The reversal of 101211201120091 is 190021102112101.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 101211201120091 - 2¹¹ = 101211201118043 is a prime.

It is a super-3 number, since 3×101211201120091³ (a number of 43 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (101211201120041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50605600560045 + 50605600560046.

It is an arithmetic number, because the mean of its divisors is an integer number (50605600560046).

Almost surely, 2^{101211201120091} is an apocalyptic number.

101211201120091 is a deficient number, since it is larger than the sum of its proper divisors (1).

101211201120091 is an equidigital number, since it uses as much as digits as its factorization.

101211201120091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 22.

Adding to 101211201120091 its reverse (190021102112101), we get a palindrome (291232303232192).

The spelling of 101211201120091 in words is "one hundred one trillion, two hundred eleven billion, two hundred one million, one hundred twenty thousand, ninety-one".