105501001091 has 2 divisors, whose sum is σ = 105501001092. Its totient is φ = 105501001090.

The previous prime is 105501001051. The next prime is 105501001141. The reversal of 105501001091 is 190100105501.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-105501001091 is a prime.

It is a super-2 number, since 2×105501001091² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (105501001051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52750500545 + 52750500546.

It is an arithmetic number, because the mean of its divisors is an integer number (52750500546).

Almost surely, 2^105501001091 is an apocalyptic number.

105501001091 is a deficient number, since it is larger than the sum of its proper divisors (1).

105501001091 is an equidigital number, since it uses as much as digits as its factorization.

105501001091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 225, while the sum is 23.

Adding to 105501001091 its reverse (190100105501), we get a palindrome (295601106592).

The spelling of 105501001091 in words is "one hundred five billion, five hundred one million, one thousand, ninety-one".