222002221001021 has 8 divisors (see below), whose sum is σ = 222236129768184. Its totient is φ = 221768314243840.

The previous prime is 222002221000939. The next prime is 222002221001047. The reversal of 222002221001021 is 120100122200222.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 26758749568996 + 195243471432025 = 5172886^2 + 13972955^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 222002221001021 - 2¹⁰ = 222002220999997 is a prime.

It is a super-2 number, since 2×222002221001021² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222002221001051) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 346492841 + ... + 347132961.

It is an arithmetic number, because the mean of its divisors is an integer number (27779516221023).

Almost surely, 2^{222002221001021} is an apocalyptic number.

It is an amenable number.

222002221001021 is a deficient number, since it is larger than the sum of its proper divisors (233908767163).

222002221001021 is an equidigital number, since it uses as much as digits as its factorization.

222002221001021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1004991.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 222002221001021 its reverse (120100122200222), we get a palindrome (342102343201243).

The spelling of 222002221001021 in words is "two hundred twenty-two trillion, two billion, two hundred twenty-one million, one thousand, twenty-one".