21010220220002 has 16 divisors (see below), whose sum is σ = 34579956068280. Its totient is φ = 9514061985792.

The previous prime is 21010220220001. The next prime is 21010220220013. The reversal of 21010220220002 is 20002202201012.

It can be written as a sum of positive squares in 4 ways, for example, as 20608503836281 + 401716383721 = 4539659^2 + 633811^2 .

It is not an unprimeable number, because it can be changed into a prime (21010220220001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7623445727 + ... + 7623448482.

Almost surely, 2^{21010220220002} is an apocalyptic number.

21010220220002 is a deficient number, since it is larger than the sum of its proper divisors (13569735848278).

21010220220002 is a wasteful number, since it uses less digits than its factorization.

21010220220002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15246894277.

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 21010220220002 its reverse (20002202201012), we get a palindrome (41012422421014).

The spelling of 21010220220002 in words is "twenty-one trillion, ten billion, two hundred twenty million, two hundred twenty thousand, two".