222222020121001 has 4 divisors (see below), whose sum is σ = 222317271739332. Its totient is φ = 222126768502672.

The previous prime is 222222020120983. The next prime is 222222020121011. The reversal of 222222020121001 is 100121020222222.

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 149898884622400 + 72323135498601 = 12243320^2 + 8504301^2 .

It is a cyclic number.

It is not a de Polignac number, because 222222020121001 - 2³⁹ = 221672264307113 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 222222020121001.

It is not an unprimeable number, because it can be changed into a prime (222222020121011) 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, 47625805666 + ... + 47625810331.

It is an arithmetic number, because the mean of its divisors is an integer number (55579317934833).

Almost surely, 2^{222222020121001} is an apocalyptic number.

It is an amenable number.

222222020121001 is a deficient number, since it is larger than the sum of its proper divisors (95251618331).

222222020121001 is an equidigital number, since it uses as much as digits as its factorization.

222222020121001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95251618330.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 222222020121001 its reverse (100121020222222), we get a palindrome (322343040343223).

The spelling of 222222020121001 in words is "two hundred twenty-two trillion, two hundred twenty-two billion, twenty million, one hundred twenty-one thousand, one".