21000222002 has 8 divisors (see below), whose sum is σ = 31931844636. Its totient is φ = 10356273792.

The previous prime is 21000221989. The next prime is 21000222007. The reversal of 21000222002 is 20022200012.

It can be written as a sum of positive squares in 2 ways, for example, as 20782393921 + 217828081 = 144161^2 + 14759^2 .

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

It is not an unprimeable number, because it can be changed into a prime (21000222007) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71918423 + ... + 71918714.

Almost surely, 2^21000222002 is an apocalyptic number.

21000222002 is a deficient number, since it is larger than the sum of its proper divisors (10931622634).

21000222002 is a wasteful number, since it uses less digits than its factorization.

21000222002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143837212.

The product of its (nonzero) digits is 32, while the sum is 11.

Adding to 21000222002 its reverse (20022200012), we get a palindrome (41022422014).

The spelling of 21000222002 in words is "twenty-one billion, two hundred twenty-two thousand, two".