122201202100021 has 16 divisors (see below), whose sum is σ = 137645763724800. Its totient is φ = 107481024979200.

The previous prime is 122201202100013. The next prime is 122201202100039. The reversal of 122201202100021 is 120001202102221.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 122201202100021 - 2³ = 122201202100013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 122201202099968 and 122201202100004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122201202104021) 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, 44264856 + ... + 46944433.

It is an arithmetic number, because the mean of its divisors is an integer number (8602860232800).

Almost surely, 2^{122201202100021} is an apocalyptic number.

122201202100021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

122201202100021 is a deficient number, since it is larger than the sum of its proper divisors (15444561624779).

122201202100021 is a wasteful number, since it uses less digits than its factorization.

122201202100021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91213260.

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

Adding to 122201202100021 its reverse (120001202102221), we get a palindrome (242202404202242).

The spelling of 122201202100021 in words is "one hundred twenty-two trillion, two hundred one billion, two hundred two million, one hundred thousand, twenty-one".