122220000121221 has 12 divisors (see below), whose sum is σ = 176540115050572. Its totient is φ = 81479947061376.

The previous prime is 122220000121211. The next prime is 122220000121237. The reversal of 122220000121221 is 122121000022221.

It is a happy number.

122220000121221 is a `hidden beast` number, since 1 + 222 + 200 + 0 + 0 + 1 + 21 + 221 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 34636344120225 + 87583656000996 = 5885265^2 + 9358614^2 .

It is not a de Polignac number, because 122220000121221 - 2⁶ = 122220000121157 is a prime.

It is a super-2 number, since 2×122220000121221² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 122220000121194 and 122220000121203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122220000121211) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14399475 + ... + 21255231.

Almost surely, 2^{122220000121221} is an apocalyptic number.

It is an amenable number.

122220000121221 is a deficient number, since it is larger than the sum of its proper divisors (54320114929351).

122220000121221 is a wasteful number, since it uses less digits than its factorization.

122220000121221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8836580 (or 8836577 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 122220000121221 its reverse (122121000022221), we get a palindrome (244341000143442).

The spelling of 122220000121221 in words is "one hundred twenty-two trillion, two hundred twenty billion, one hundred twenty-one thousand, two hundred twenty-one".