21210011201210 has 32 divisors (see below), whose sum is σ = 41478638680080. Its totient is φ = 7762084420608.

The previous prime is 21210011201191. The next prime is 21210011201237. The reversal of 21210011201210 is 1210211001212.

It can be written as a sum of positive squares in 8 ways, for example, as 1064357432329 + 20145653768881 = 1031677^2 + 4488391^2 .

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, 721905365 + ... + 721934744.

Almost surely, 2^{21210011201210} is an apocalyptic number.

21210011201210 is a deficient number, since it is larger than the sum of its proper divisors (20268627478870).

21210011201210 is a wasteful number, since it uses less digits than its factorization.

21210011201210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1443840242.

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

Adding to 21210011201210 its reverse (1210211001212), we get a palindrome (22420222202422).

The spelling of 21210011201210 in words is "twenty-one trillion, two hundred ten billion, eleven million, two hundred one thousand, two hundred ten".