21000002222222 has 16 divisors (see below), whose sum is σ = 33393274792560. Its totient is φ = 9870404331648.

The previous prime is 21000002222201. The next prime is 21000002222231. The reversal of 21000002222222 is 22222220000012.

It is a super-3 number, since 3×21000002222222³ (a number of 41 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (17).

21000002222222 is a modest number, since divided by 2222222 gives 2100000 as remainder.

It is a self number, because there is not a number n which added to its sum of digits gives 21000002222222.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 373398197 + ... + 373454432.

It is an arithmetic number, because the mean of its divisors is an integer number (2087079674535).

Almost surely, 2^{21000002222222} is an apocalyptic number.

21000002222222 is a deficient number, since it is larger than the sum of its proper divisors (12393272570338).

21000002222222 is a wasteful number, since it uses less digits than its factorization.

21000002222222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 746853475.

The product of its (nonzero) digits is 256, while the sum is 17.

Adding to 21000002222222 its reverse (22222220000012), we get a palindrome (43222222222234).

The spelling of 21000002222222 in words is "twenty-one trillion, two million, two hundred twenty-two thousand, two hundred twenty-two".