122111121011 has 4 divisors (see below), whose sum is σ = 133212132024. Its totient is φ = 111010110000.

The previous prime is 122111120993. The next prime is 122111121017. The reversal of 122111121011 is 110121111221.

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

It is a cyclic number.

It is not a de Polignac number, because 122111121011 - 2¹⁰ = 122111119987 is a prime.

It is a super-2 number, since 2×122111121011² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (122111121017) 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, 5550505490 + ... + 5550505511.

It is an arithmetic number, because the mean of its divisors is an integer number (33303033006).

Almost surely, 2^122111121011 is an apocalyptic number.

122111121011 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

122111121011 is a deficient number, since it is larger than the sum of its proper divisors (11101011013).

122111121011 is a wasteful number, since it uses less digits than its factorization.

122111121011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11101011012.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 122111121011 its reverse (110121111221), we get a palindrome (232232232232).

It can be divided in two parts, 1221111210 and 11, that added together give a palindrome (1221111221).

The spelling of 122111121011 in words is "one hundred twenty-two billion, one hundred eleven million, one hundred twenty-one thousand, eleven".