122111022121 has 24 divisors (see below), whose sum is σ = 137460262464.
Its totient is φ = 108362100000.
The previous prime is 122111022113. The next prime is 122111022169. The reversal of 122111022121 is 121220111221.
It is not a de Polignac number, because 122111022121 - 23 = 122111022113 is a prime.
It is a super-2 number, since 2×1221110221212 (a number of 23 digits) contains 22 as substring.
It is a Duffinian number.
It is a junction number, because it is equal to n+sod(n) for n = 122111022095 and 122111022104.
It is not an unprimeable number, because it can be changed into a prime (122111022101) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (17) of ones.
It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 797326 + ... + 938056.
It is an arithmetic number, because the mean of its divisors is an integer number (5727510936).
Almost surely, 2122111022121 is an apocalyptic number.
122111022121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.
It is an amenable number.
122111022121 is a deficient number, since it is larger than the sum of its proper divisors (15349240343).
122111022121 is a wasteful number, since it uses less digits than its factorization.
122111022121 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 140925 (or 140914 counting only the distinct ones).
The product of its (nonzero) digits is 32, while the sum is 16.
Adding to 122111022121 its reverse (121220111221), we get a palindrome (243331133342).
The spelling of 122111022121 in words is "one hundred twenty-two billion, one hundred eleven million, twenty-two thousand, one hundred twenty-one".