122222200020021 has 12 divisors (see below), whose sum is σ = 180849108973260. Its totient is φ = 79494113833920.

The previous prime is 122222200020013. The next prime is 122222200020097. The reversal of 122222200020021 is 120020002222221.

122222200020021 is a `hidden beast` number, since 1 + 2 + 222 + 220 + 0 + 0 + 200 + 21 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 3776220562500 + 118445979457521 = 1943250^2 + 10883289^2 .

It is not a de Polignac number, because 122222200020021 - 2³ = 122222200020013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 122222200019976 and 122222200020003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122222201020021) 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 11 ways as a sum of consecutive naturals, for example, 165612736786 + ... + 165612737523.

It is an arithmetic number, because the mean of its divisors is an integer number (15070759081105).

Almost surely, 2^{122222200020021} is an apocalyptic number.

It is an amenable number.

122222200020021 is a deficient number, since it is larger than the sum of its proper divisors (58626908953239).

122222200020021 is a wasteful number, since it uses less digits than its factorization.

122222200020021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 331225474356 (or 331225474353 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 122222200020021 its reverse (120020002222221), we get a palindrome (242242202242242).

The spelling of 122222200020021 in words is "one hundred twenty-two trillion, two hundred twenty-two billion, two hundred million, twenty thousand, twenty-one".