222222001101021 has 64 divisors (see below), whose sum is σ = 348390832803840. Its totient is φ = 139702586063040.

The previous prime is 222222001100971. The next prime is 222222001101031. The reversal of 222222001101021 is 120101100222222.

It is a happy number.

It is not a de Polignac number, because 222222001101021 - 2⁷ = 222222001100893 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 222222001100985 and 222222001101003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222222001101031) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 786309886 + ... + 786592448.

It is an arithmetic number, because the mean of its divisors is an integer number (5443606762560).

Almost surely, 2^{222222001101021} is an apocalyptic number.

It is an amenable number.

222222001101021 is a deficient number, since it is larger than the sum of its proper divisors (126168831702819).

222222001101021 is a wasteful number, since it uses less digits than its factorization.

222222001101021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 300503 (or 300497 counting only the distinct ones).

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

Adding to 222222001101021 its reverse (120101100222222), we get a palindrome (342323101323243).

The spelling of 222222001101021 in words is "two hundred twenty-two trillion, two hundred twenty-two billion, one million, one hundred one thousand, twenty-one".