21210202021202 has 16 divisors (see below), whose sum is σ = 33199437729600. Its totient is φ = 10143746685072.

The previous prime is 21210202021201. The next prime is 21210202021237. The reversal of 21210202021202 is 20212020201212.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (21210202021201) 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, 4177253 + ... + 7737560.

It is an arithmetic number, because the mean of its divisors is an integer number (2074964858100).

Almost surely, 2^{21210202021202} is an apocalyptic number.

21210202021202 is a deficient number, since it is larger than the sum of its proper divisors (11989235708398).

21210202021202 is a wasteful number, since it uses less digits than its factorization.

21210202021202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11953537.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 21210202021202 its reverse (20212020201212), we get a palindrome (41422222222414).

The spelling of 21210202021202 in words is "twenty-one trillion, two hundred ten billion, two hundred two million, twenty-one thousand, two hundred two".