121112122021 has 8 divisors (see below), whose sum is σ = 133430457888. Its totient is φ = 109011810000.

The previous prime is 121112122013. The next prime is 121112122049. The reversal of 121112122021 is 120221211121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 121112122021 - 2³ = 121112122013 is a prime.

It is a super-2 number, since 2×121112122021² (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 = 121112121986 and 121112122004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121112122081) 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 7 ways as a sum of consecutive naturals, for example, 54504795 + ... + 54507016.

It is an arithmetic number, because the mean of its divisors is an integer number (16678807236).

Almost surely, 2^121112122021 is an apocalyptic number.

121112122021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

121112122021 is a deficient number, since it is larger than the sum of its proper divisors (12318335867).

121112122021 is a wasteful number, since it uses less digits than its factorization.

121112122021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109011923.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 121112122021 its reverse (120221211121), we get a palindrome (241333333142).

The spelling of 121112122021 in words is "one hundred twenty-one billion, one hundred twelve million, one hundred twenty-two thousand, twenty-one".