21331121013210 has 32 divisors (see below), whose sum is σ = 51195798316800. Its totient is φ = 5688175838528.

The previous prime is 21331121013199. The next prime is 21331121013247. The reversal of 21331121013210 is 1231012113312.

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, 6280002 + ... + 9060941.

It is an arithmetic number, because the mean of its divisors is an integer number (1599868697400).

Almost surely, 2^{21331121013210} is an apocalyptic number.

21331121013210 is an abundant number, since it is smaller than the sum of its proper divisors (29864677303590).

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

21331121013210 is a wasteful number, since it uses less digits than its factorization.

21331121013210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15387302.

The product of its (nonzero) digits is 216, while the sum is 21.

Adding to 21331121013210 its reverse (1231012113312), we get a palindrome (22562133126522).

The spelling of 21331121013210 in words is "twenty-one trillion, three hundred thirty-one billion, one hundred twenty-one million, thirteen thousand, two hundred ten".