222001020021 has 16 divisors (see below), whose sum is σ = 322918479360. Its totient is φ = 134542779120.

The previous prime is 222001020019. The next prime is 222001020029. The reversal of 222001020021 is 120020100222.

It is not a de Polignac number, because 222001020021 - 2¹ = 222001020019 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 222001019979 and 222001020006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222001020029) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2432806 + ... + 2522408.

It is an arithmetic number, because the mean of its divisors is an integer number (20182404960).

Almost surely, 2^222001020021 is an apocalyptic number.

It is an amenable number.

222001020021 is a deficient number, since it is larger than the sum of its proper divisors (100917459339).

222001020021 is a wasteful number, since it uses less digits than its factorization.

222001020021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164696.

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 222001020021 its reverse (120020100222), we get a palindrome (342021120243).

The spelling of 222001020021 in words is "two hundred twenty-two billion, one million, twenty thousand, twenty-one".