1012201210091 has 2 divisors, whose sum is σ = 1012201210092. Its totient is φ = 1012201210090.

The previous prime is 1012201210039. The next prime is 1012201210103. The reversal of 1012201210091 is 1900121022101.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1012201210091 - 2²⁶ = 1012134101227 is a prime.

It is a super-3 number, since 3×1012201210091³ (a number of 37 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (1012201212091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 506100605045 + 506100605046.

It is an arithmetic number, because the mean of its divisors is an integer number (506100605046).

Almost surely, 2^{1012201210091} is an apocalyptic number.

1012201210091 is a deficient number, since it is larger than the sum of its proper divisors (1).

1012201210091 is an equidigital number, since it uses as much as digits as its factorization.

1012201210091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 20.

Adding to 1012201210091 its reverse (1900121022101), we get a palindrome (2912322232192).

The spelling of 1012201210091 in words is "one trillion, twelve billion, two hundred one million, two hundred ten thousand, ninety-one".