122122210021 has 16 divisors (see below), whose sum is σ = 147893503104. Its totient is φ = 98441846784.

The previous prime is 122122210019. The next prime is 122122210037. The reversal of 122122210021 is 120012221221.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 122122210021 - 2¹ = 122122210019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 122122209977 and 122122210004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122122210321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 247260 + ... + 552613.

It is an arithmetic number, because the mean of its divisors is an integer number (9243343944).

Almost surely, 2^122122210021 is an apocalyptic number.

It is an amenable number.

122122210021 is a deficient number, since it is larger than the sum of its proper divisors (25771293083).

122122210021 is a wasteful number, since it uses less digits than its factorization.

122122210021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 801180.

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

Adding to 122122210021 its reverse (120012221221), we get a palindrome (242134431242).

The spelling of 122122210021 in words is "one hundred twenty-two billion, one hundred twenty-two million, two hundred ten thousand, twenty-one".