21211100201210 has 8 divisors (see below), whose sum is σ = 38179980362196. Its totient is φ = 8484440080480.

The previous prime is 21211100201201. The next prime is 21211100201327. The reversal of 21211100201210 is 1210200111212.

It can be written as a sum of positive squares in 2 ways, for example, as 21204247507249 + 6852693961 = 4604807^2 + 82781^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1060555010051 + ... + 1060555010070.

Almost surely, 2^{21211100201210} is an apocalyptic number.

21211100201210 is a deficient number, since it is larger than the sum of its proper divisors (16968880160986).

21211100201210 is a wasteful number, since it uses less digits than its factorization.

21211100201210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2121110020128.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 21211100201210 its reverse (1210200111212), we get a palindrome (22421300312422).

The spelling of 21211100201210 in words is "twenty-one trillion, two hundred eleven billion, one hundred million, two hundred one thousand, two hundred ten".