21311300311210 has 64 divisors (see below), whose sum is σ = 47251651571712. Its totient is φ = 6739114588416.

The previous prime is 21311300311199. The next prime is 21311300311243. The reversal of 21311300311210 is 1211300311312.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8549514 + ... + 10757173.

It is an arithmetic number, because the mean of its divisors is an integer number (738307055808).

Almost surely, 2^{21311300311210} is an apocalyptic number.

21311300311210 is an abundant number, since it is smaller than the sum of its proper divisors (25940351260502).

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

21311300311210 is a wasteful number, since it uses less digits than its factorization.

21311300311210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19307927.

The product of its (nonzero) digits is 108, while the sum is 19.

Adding to 21311300311210 its reverse (1211300311312), we get a palindrome (22522600622522).

The spelling of 21311300311210 in words is "twenty-one trillion, three hundred eleven billion, three hundred million, three hundred eleven thousand, two hundred ten".