121022011121 has 4 divisors (see below), whose sum is σ = 132024012144. Its totient is φ = 110020010100.

The previous prime is 121022011111. The next prime is 121022011141. The reversal of 121022011121 is 121110220121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 121022011121 - 2³⁰ = 119948269297 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121022011096 and 121022011105.

It is not an unprimeable number, because it can be changed into a prime (121022011111) 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, 5501000495 + ... + 5501000516.

It is an arithmetic number, because the mean of its divisors is an integer number (33006003036).

Almost surely, 2^121022011121 is an apocalyptic number.

121022011121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

121022011121 is a deficient number, since it is larger than the sum of its proper divisors (11002001023).

121022011121 is a wasteful number, since it uses less digits than its factorization.

121022011121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11002001022.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 121022011121 its reverse (121110220121), we get a palindrome (242132231242).

The spelling of 121022011121 in words is "one hundred twenty-one billion, twenty-two million, eleven thousand, one hundred twenty-one".