101211112020091 has 2 divisors, whose sum is σ = 101211112020092. Its totient is φ = 101211112020090.

The previous prime is 101211112020077. The next prime is 101211112020131. The reversal of 101211112020091 is 190020211112101.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 101211112020091 - 2¹⁹ = 101211111495803 is a prime.

It is not a weakly prime, because it can be changed into another prime (101211112020001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50605556010045 + 50605556010046.

It is an arithmetic number, because the mean of its divisors is an integer number (50605556010046).

Almost surely, 2^{101211112020091} is an apocalyptic number.

101211112020091 is a deficient number, since it is larger than the sum of its proper divisors (1).

101211112020091 is an equidigital number, since it uses as much as digits as its factorization.

101211112020091 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 101211112020091 its reverse (190020211112101), we get a palindrome (291231323132192).

The spelling of 101211112020091 in words is "one hundred one trillion, two hundred eleven billion, one hundred twelve million, twenty thousand, ninety-one".