20211104140091 has 2 divisors, whose sum is σ = 20211104140092. Its totient is φ = 20211104140090.

The previous prime is 20211104140061. The next prime is 20211104140163. The reversal of 20211104140091 is 19004140111202.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20211104140091 - 2¹⁰ = 20211104139067 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20211104140091.

It is not a weakly prime, because it can be changed into another prime (20211104140061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10105552070045 + 10105552070046.

It is an arithmetic number, because the mean of its divisors is an integer number (10105552070046).

Almost surely, 2^{20211104140091} is an apocalyptic number.

20211104140091 is a deficient number, since it is larger than the sum of its proper divisors (1).

20211104140091 is an equidigital number, since it uses as much as digits as its factorization.

20211104140091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 26.

Adding to 20211104140091 its reverse (19004140111202), we get a palindrome (39215244251293).

The spelling of 20211104140091 in words is "twenty trillion, two hundred eleven billion, one hundred four million, one hundred forty thousand, ninety-one".