121122102021021 has 24 divisors (see below), whose sum is σ = 175621682396160. Its totient is φ = 80439983002656.

The previous prime is 121122102021007. The next prime is 121122102021049. The reversal of 121122102021021 is 120120201221121.

121122102021021 is a `hidden beast` number, since 1 + 211 + 221 + 0 + 2 + 0 + 210 + 21 = 666.

It is not a de Polignac number, because 121122102021021 - 2⁵ = 121122102020989 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121122102020985 and 121122102021003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121122102021071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 206485875 + ... + 207071631.

It is an arithmetic number, because the mean of its divisors is an integer number (7317570099840).

Almost surely, 2^{121122102021021} is an apocalyptic number.

It is an amenable number.

121122102021021 is a deficient number, since it is larger than the sum of its proper divisors (54499580375139).

121122102021021 is a wasteful number, since it uses less digits than its factorization.

121122102021021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 673385 (or 673382 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 121122102021021 its reverse (120120201221121), we get a palindrome (241242303242142).

The spelling of 121122102021021 in words is "one hundred twenty-one trillion, one hundred twenty-two billion, one hundred two million, twenty-one thousand, twenty-one".