20110211011091 has 2 divisors, whose sum is σ = 20110211011092. Its totient is φ = 20110211011090.

The previous prime is 20110211011003. The next prime is 20110211011127. The reversal of 20110211011091 is 19011011201102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20110211011091 - 2¹⁰ = 20110211010067 is a prime.

It is not a weakly prime, because it can be changed into another prime (20110211011591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10055105505545 + 10055105505546.

It is an arithmetic number, because the mean of its divisors is an integer number (10055105505546).

Almost surely, 2^{20110211011091} is an apocalyptic number.

20110211011091 is a deficient number, since it is larger than the sum of its proper divisors (1).

20110211011091 is an equidigital number, since it uses as much as digits as its factorization.

20110211011091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 20.

Adding to 20110211011091 its reverse (19011011201102), we get a palindrome (39121222212193).

The spelling of 20110211011091 in words is "twenty trillion, one hundred ten billion, two hundred eleven million, eleven thousand, ninety-one".