21012202002210 has 16 divisors (see below), whose sum is σ = 50429284805376. Its totient is φ = 5603253867248.

The previous prime is 21012202002179. The next prime is 21012202002227. The reversal of 21012202002210 is 1220020221012.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 21012202002210.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 350203366674 + ... + 350203366733.

It is an arithmetic number, because the mean of its divisors is an integer number (3151830300336).

Almost surely, 2^{21012202002210} is an apocalyptic number.

21012202002210 is an abundant number, since it is smaller than the sum of its proper divisors (29417082803166).

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

21012202002210 is a wasteful number, since it uses less digits than its factorization.

21012202002210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 700406733417.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 21012202002210 its reverse (1220020221012), we get a palindrome (22232222223222).

The spelling of 21012202002210 in words is "twenty-one trillion, twelve billion, two hundred two million, two thousand, two hundred ten".