122101011111 has 4 divisors (see below), whose sum is σ = 162801348152. Its totient is φ = 81400674072.

The previous prime is 122101011061. The next prime is 122101011113. The reversal of 122101011111 is 111110101221.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 122101011111 - 2⁹ = 122101010599 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122101011113) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20350168516 + ... + 20350168521.

It is an arithmetic number, because the mean of its divisors is an integer number (40700337038).

Almost surely, 2^122101011111 is an apocalyptic number.

122101011111 is a deficient number, since it is larger than the sum of its proper divisors (40700337041).

122101011111 is an equidigital number, since it uses as much as digits as its factorization.

122101011111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40700337040.

The product of its (nonzero) digits is 4, while the sum is 12.

Adding to 122101011111 its reverse (111110101221), we get a palindrome (233211112332).

The spelling of 122101011111 in words is "one hundred twenty-two billion, one hundred one million, eleven thousand, one hundred eleven".