21300121310 has 32 divisors (see below), whose sum is σ = 41316210432. Its totient is φ = 7859566080.

The previous prime is 21300121307. The next prime is 21300121343. The reversal of 21300121310 is 1312100312.

It is a super-2 number, since 2×21300121310² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

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, 151430 + ... + 255990.

It is an arithmetic number, because the mean of its divisors is an integer number (1291131576).

Almost surely, 2^21300121310 is an apocalyptic number.

21300121310 is a deficient number, since it is larger than the sum of its proper divisors (20016089122).

21300121310 is a wasteful number, since it uses less digits than its factorization.

21300121310 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106148.

The product of its (nonzero) digits is 36, while the sum is 14.

Adding to 21300121310 its reverse (1312100312), we get a palindrome (22612221622).

The spelling of 21300121310 in words is "twenty-one billion, three hundred million, one hundred twenty-one thousand, three hundred ten".