100000222221121 has 2 divisors, whose sum is σ = 100000222221122. Its totient is φ = 100000222221120.

The previous prime is 100000222221091. The next prime is 100000222221139. The reversal of 100000222221121 is 121122222000001.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 84760286706225 + 15239935514896 = 9206535^2 + 3903836^2 .

It is an emirp because it is prime and its reverse (121122222000001) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 100000222221121 - 2³⁵ = 99965862482753 is a prime.

It is a super-5 number, since 5×100000222221121⁵ (a number of 71 digits) contains 55555 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 100000222221095 and 100000222221104.

It is not a weakly prime, because it can be changed into another prime (100000222221821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50000111110560 + 50000111110561.

It is an arithmetic number, because the mean of its divisors is an integer number (50000111110561).

Almost surely, 2^{100000222221121} is an apocalyptic number.

It is an amenable number.

100000222221121 is a deficient number, since it is larger than the sum of its proper divisors (1).

100000222221121 is an equidigital number, since it uses as much as digits as its factorization.

100000222221121 is an evil number, because the sum of its binary digits is even.

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

Adding to 100000222221121 its reverse (121122222000001), we get a palindrome (221122444221122).

The spelling of 100000222221121 in words is "one hundred trillion, two hundred twenty-two million, two hundred twenty-one thousand, one hundred twenty-one".