122222012021 has 16 divisors (see below), whose sum is σ = 123557117376. Its totient is φ = 120895047936.

The previous prime is 122222012009. The next prime is 122222012119. The reversal of 122222012021 is 120210222221.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-122222012021 is a prime.

It is a super-2 number, since 2×122222012021² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122222012221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68779085 + ... + 68780861.

It is an arithmetic number, because the mean of its divisors is an integer number (7722319836).

Almost surely, 2^122222012021 is an apocalyptic number.

It is an amenable number.

122222012021 is a deficient number, since it is larger than the sum of its proper divisors (1335105355).

122222012021 is a wasteful number, since it uses less digits than its factorization.

122222012021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3668.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 122222012021 its reverse (120210222221), we get a palindrome (242432234242).

The spelling of 122222012021 in words is "one hundred twenty-two billion, two hundred twenty-two million, twelve thousand, twenty-one".