122121121111 has 16 divisors (see below), whose sum is σ = 134730086400. Its totient is φ = 109766404000.

The previous prime is 122121121099. The next prime is 122121121121. The reversal of 122121121111 is 111121121221.

It is not a de Polignac number, because 122121121111 - 2⁷ = 122121120983 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 (122121121121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 722370 + ... + 875248.

It is an arithmetic number, because the mean of its divisors is an integer number (8420630400).

Almost surely, 2^122121121111 is an apocalyptic number.

122121121111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

122121121111 is a deficient number, since it is larger than the sum of its proper divisors (12608965289).

122121121111 is a wasteful number, since it uses less digits than its factorization.

122121121111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153710.

The product of its digits is 16, while the sum is 16.

Adding to 122121121111 its reverse (111121121221), we get a palindrome (233242242332).

The spelling of 122121121111 in words is "one hundred twenty-two billion, one hundred twenty-one million, one hundred twenty-one thousand, one hundred eleven".