21330031031310 has 16 divisors (see below), whose sum is σ = 51192074475216. Its totient is φ = 5688008275008.

The previous prime is 21330031031263. The next prime is 21330031031311. The reversal of 21330031031310 is 1313013003312.

It is a super-2 number, since 2×21330031031310² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21330031031311) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 355500517159 + ... + 355500517218.

It is an arithmetic number, because the mean of its divisors is an integer number (3199504654701).

Almost surely, 2^{21330031031310} is an apocalyptic number.

21330031031310 is an abundant number, since it is smaller than the sum of its proper divisors (29862043443906).

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

21330031031310 is a wasteful number, since it uses less digits than its factorization.

21330031031310 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 711001034387.

The product of its (nonzero) digits is 486, while the sum is 21.

Adding to 21330031031310 its reverse (1313013003312), we get a palindrome (22643044034622).

The spelling of 21330031031310 in words is "twenty-one trillion, three hundred thirty billion, thirty-one million, thirty-one thousand, three hundred ten".