21011210210202 has 32 divisors (see below), whose sum is σ = 44249919693120. Its totient is φ = 6632750073600.

The previous prime is 21011210210201. The next prime is 21011210210231. The reversal of 21011210210202 is 20201201211012.

It is not an unprimeable number, because it can be changed into a prime (21011210210201) 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, 32581233 + ... + 33219860.

It is an arithmetic number, because the mean of its divisors is an integer number (1382809990410).

Almost surely, 2^{21011210210202} is an apocalyptic number.

21011210210202 is an abundant number, since it is smaller than the sum of its proper divisors (23238709482918).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21011210210202 is a wasteful number, since it uses less digits than its factorization.

21011210210202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65803918.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 21011210210202 its reverse (20201201211012), we get a palindrome (41212411421214).

The spelling of 21011210210202 in words is "twenty-one trillion, eleven billion, two hundred ten million, two hundred ten thousand, two hundred two".