222022021 has 16 divisors (see below), whose sum is σ = 242355568. Its totient is φ = 202176000.

The previous prime is 222022019. The next prime is 222022033. The reversal of 222022021 is 120220222.

It can be written as a sum of positive squares in 8 ways, for example, as 42837025 + 179184996 = 6545^2 + 13386^2 .

It is not a de Polignac number, because 222022021 - 2¹ = 222022019 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a junction number, because it is equal to n+sod(n) for n = 222021992 and 222022010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222022001) 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, 369121 + ... + 369721.

It is an arithmetic number, because the mean of its divisors is an integer number (15147223).

Almost surely, 2^222022021 is an apocalyptic number.

It is an amenable number.

222022021 is a deficient number, since it is larger than the sum of its proper divisors (20333547).

222022021 is a wasteful number, since it uses less digits than its factorization.

222022021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 952.

The product of its (nonzero) digits is 64, while the sum is 13.

The square root of 222022021 is about 14900.4033838014. The cubic root of 222022021 is about 605.5249147449.

Adding to 222022021 its reverse (120220222), we get a palindrome (342242243).

The spelling of 222022021 in words is "two hundred twenty-two million, twenty-two thousand, twenty-one".