222220120212121 has 4 divisors (see below), whose sum is σ = 224420319422244. Its totient is φ = 220019921002000.

The previous prime is 222220120212113. The next prime is 222220120212133. The reversal of 222220120212121 is 121212021022222.

222220120212121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 166432291946496 + 55787828265625 = 12900864^2 + 7469125^2 .

It is a cyclic number.

It is not a de Polignac number, because 222220120212121 - 2³ = 222220120212113 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 222220120212092 and 222220120212101.

It is not an unprimeable number, because it can be changed into a prime (222220120312121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1100099604910 + ... + 1100099605111.

It is an arithmetic number, because the mean of its divisors is an integer number (56105079855561).

Almost surely, 2^{222220120212121} is an apocalyptic number.

It is an amenable number.

222220120212121 is a deficient number, since it is larger than the sum of its proper divisors (2200199210123).

222220120212121 is a wasteful number, since it uses less digits than its factorization.

222220120212121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2200199210122.

The product of its (nonzero) digits is 512, while the sum is 22.

Adding to 222220120212121 its reverse (121212021022222), we get a palindrome (343432141234343).

The spelling of 222220120212121 in words is "two hundred twenty-two trillion, two hundred twenty billion, one hundred twenty million, two hundred twelve thousand, one hundred twenty-one".