222002100021 has 16 divisors (see below), whose sum is σ = 318781305920. Its totient is φ = 136612794240.

The previous prime is 222002099947. The next prime is 222002100059. The reversal of 222002100021 is 120001200222.

It is not a de Polignac number, because 222002100021 - 2¹¹ = 222002097973 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222002101021) 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, 1962090 + ... + 2072148.

It is an arithmetic number, because the mean of its divisors is an integer number (19923831620).

Almost surely, 2^222002100021 is an apocalyptic number.

It is an amenable number.

222002100021 is a deficient number, since it is larger than the sum of its proper divisors (96779205899).

222002100021 is a wasteful number, since it uses less digits than its factorization.

222002100021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161796.

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

Adding to 222002100021 its reverse (120001200222), we get a palindrome (342003300243).

The spelling of 222002100021 in words is "two hundred twenty-two billion, two million, one hundred thousand, twenty-one".