222222021020121 has 4 divisors (see below), whose sum is σ = 296296028026832. Its totient is φ = 148148014013412.

The previous prime is 222222021020099. The next prime is 222222021020149. The reversal of 222222021020121 is 121020120222222.

222222021020121 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 222222021020121 - 2²³ = 222222012631513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (222222021020621) 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, 37037003503351 + ... + 37037003503356.

It is an arithmetic number, because the mean of its divisors is an integer number (74074007006708).

Almost surely, 2^{222222021020121} is an apocalyptic number.

It is an amenable number.

222222021020121 is a deficient number, since it is larger than the sum of its proper divisors (74074007006711).

222222021020121 is an equidigital number, since it uses as much as digits as its factorization.

222222021020121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74074007006710.

The product of its (nonzero) digits is 512, while the sum is 21.

Adding to 222222021020121 its reverse (121020120222222), we get a palindrome (343242141242343).

The spelling of 222222021020121 in words is "two hundred twenty-two trillion, two hundred twenty-two billion, twenty-one million, twenty thousand, one hundred twenty-one".