20121340165310 has 64 divisors (see below), whose sum is σ = 36861102298944. Its totient is φ = 7906404633600.

The previous prime is 20121340165271. The next prime is 20121340165337. The reversal of 20121340165310 is 1356104312102.

It is a super-2 number, since 2×20121340165310² (a number of 27 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 31 ways as a sum of consecutive naturals, for example, 531546344 + ... + 531584196.

It is an arithmetic number, because the mean of its divisors is an integer number (575954723421).

Almost surely, 2^{20121340165310} is an apocalyptic number.

20121340165310 is a deficient number, since it is larger than the sum of its proper divisors (16739762133634).

20121340165310 is a wasteful number, since it uses less digits than its factorization.

20121340165310 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40109.

The product of its (nonzero) digits is 4320, while the sum is 29.

Adding to 20121340165310 its reverse (1356104312102), we get a palindrome (21477444477412).

The spelling of 20121340165310 in words is "twenty trillion, one hundred twenty-one billion, three hundred forty million, one hundred sixty-five thousand, three hundred ten".