101210020091 has 2 divisors, whose sum is σ = 101210020092. Its totient is φ = 101210020090.

The previous prime is 101210020069. The next prime is 101210020103. The reversal of 101210020091 is 190020012101.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 101210020091 - 2¹⁴ = 101210003707 is a prime.

It is not a weakly prime, because it can be changed into another prime (101210020061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50605010045 + 50605010046.

It is an arithmetic number, because the mean of its divisors is an integer number (50605010046).

Almost surely, 2^101210020091 is an apocalyptic number.

101210020091 is a deficient number, since it is larger than the sum of its proper divisors (1).

101210020091 is an equidigital number, since it uses as much as digits as its factorization.

101210020091 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 17.

Adding to 101210020091 its reverse (190020012101), we get a palindrome (291230032192).

The spelling of 101210020091 in words is "one hundred one billion, two hundred ten million, twenty thousand, ninety-one".