122403120021 has 48 divisors (see below), whose sum is σ = 223486833024. Its totient is φ = 62819286912.

The previous prime is 122403119983. The next prime is 122403120023. The reversal of 122403120021 is 120021304221.

It is a happy number.

122403120021 is a `hidden beast` number, since 122 + 403 + 120 + 0 + 21 = 666.

It is not a de Polignac number, because 122403120021 - 2²⁵ = 122369565589 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 122403119976 and 122403120003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122403120023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1989351 + ... + 2049956.

It is an arithmetic number, because the mean of its divisors is an integer number (4655975688).

Almost surely, 2^122403120021 is an apocalyptic number.

It is an amenable number.

122403120021 is a deficient number, since it is larger than the sum of its proper divisors (101083713003).

122403120021 is a wasteful number, since it uses less digits than its factorization.

122403120021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4039370 (or 4039367 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 122403120021 its reverse (120021304221), we get a palindrome (242424424242).

The spelling of 122403120021 in words is "one hundred twenty-two billion, four hundred three million, one hundred twenty thousand, twenty-one".