21010211202210 has 32 divisors (see below), whose sum is σ = 53078428301760. Its totient is φ = 5307842829888.

The previous prime is 21010211202181. The next prime is 21010211202257. The reversal of 21010211202210 is 1220211201012.

It is a super-2 number, since 2×21010211202210² (a number of 27 digits) contains 22 as substring.

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 21010211202210.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18430009257 + ... + 18430010396.

It is an arithmetic number, because the mean of its divisors is an integer number (1658700884430).

Almost surely, 2^{21010211202210} is an apocalyptic number.

21010211202210 is an abundant number, since it is smaller than the sum of its proper divisors (32068217099550).

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

21010211202210 is a wasteful number, since it uses less digits than its factorization.

21010211202210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36860019682.

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

Adding to 21010211202210 its reverse (1220211201012), we get a palindrome (22230422403222).

The spelling of 21010211202210 in words is "twenty-one trillion, ten billion, two hundred eleven million, two hundred two thousand, two hundred ten".