91102201121 has 2 divisors, whose sum is σ = 91102201122. Its totient is φ = 91102201120.

The previous prime is 91102201081. The next prime is 91102201139. The reversal of 91102201121 is 12110220119.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 79996202896 + 11105998225 = 282836^2 + 105385^2 .

It is a cyclic number.

It is not a de Polignac number, because 91102201121 - 2¹⁰ = 91102200097 is a prime.

It is a super-2 number, since 2×91102201121² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 91102201093 and 91102201102.

It is not a weakly prime, because it can be changed into another prime (91102201171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45551100560 + 45551100561.

It is an arithmetic number, because the mean of its divisors is an integer number (45551100561).

Almost surely, 2^91102201121 is an apocalyptic number.

It is an amenable number.

91102201121 is a deficient number, since it is larger than the sum of its proper divisors (1).

91102201121 is an equidigital number, since it uses as much as digits as its factorization.

91102201121 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 20.

The spelling of 91102201121 in words is "ninety-one billion, one hundred two million, two hundred one thousand, one hundred twenty-one".