20122011211091 has 2 divisors, whose sum is σ = 20122011211092. Its totient is φ = 20122011211090.

The previous prime is 20122011211061. The next prime is 20122011211139. The reversal of 20122011211091 is 19011211022102.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20122011211091 - 2³⁸ = 19847133304147 is a prime.

It is a super-2 number, since 2×20122011211091² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20122011211061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10061005605545 + 10061005605546.

It is an arithmetic number, because the mean of its divisors is an integer number (10061005605546).

Almost surely, 2^{20122011211091} is an apocalyptic number.

20122011211091 is a deficient number, since it is larger than the sum of its proper divisors (1).

20122011211091 is an equidigital number, since it uses as much as digits as its factorization.

20122011211091 is an odious number, because the sum of its binary digits is odd.

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

Adding to 20122011211091 its reverse (19011211022102), we get a palindrome (39133222233193).

The spelling of 20122011211091 in words is "twenty trillion, one hundred twenty-two billion, eleven million, two hundred eleven thousand, ninety-one".