122012122021 has 4 divisors (see below), whose sum is σ = 122012827200. Its totient is φ = 122011416844.

The previous prime is 122012122013. The next prime is 122012122049. The reversal of 122012122021 is 120221210221.

It is a happy number.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 122012122021 - 2³ = 122012122013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 122012121986 and 122012122004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122012122081) 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, 104250 + ... + 504868.

It is an arithmetic number, because the mean of its divisors is an integer number (30503206800).

Almost surely, 2^122012122021 is an apocalyptic number.

It is an amenable number.

122012122021 is a deficient number, since it is larger than the sum of its proper divisors (705179).

122012122021 is an equidigital number, since it uses as much as digits as its factorization.

122012122021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 705178.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 122012122021 its reverse (120221210221), we get a palindrome (242233332242).

The spelling of 122012122021 in words is "one hundred twenty-two billion, twelve million, one hundred twenty-two thousand, twenty-one".