101211021202091 has 2 divisors, whose sum is σ = 101211021202092. Its totient is φ = 101211021202090.

The previous prime is 101211021202043. The next prime is 101211021202127. The reversal of 101211021202091 is 190202120112101.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 101211021202091 - 2¹⁰ = 101211021201067 is a prime.

It is a super-2 number, since 2×101211021202091² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (101211021202021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50605510601045 + 50605510601046.

It is an arithmetic number, because the mean of its divisors is an integer number (50605510601046).

Almost surely, 2^{101211021202091} is an apocalyptic number.

101211021202091 is a deficient number, since it is larger than the sum of its proper divisors (1).

101211021202091 is an equidigital number, since it uses as much as digits as its factorization.

101211021202091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 23.

Adding to 101211021202091 its reverse (190202120112101), we get a palindrome (291413141314192).

The spelling of 101211021202091 in words is "one hundred one trillion, two hundred eleven billion, twenty-one million, two hundred two thousand, ninety-one".