21011311323414 has 64 divisors (see below), whose sum is σ = 49151471040000. Its totient is φ = 6634853298720.

The previous prime is 21011311323403. The next prime is 21011311323419. The reversal of 21011311323414 is 41432311311012.

21011311323414 is a `hidden beast` number, since 2 + 1 + 0 + 1 + 1 + 311 + 3 + 2 + 341 + 4 = 666.

It is a super-2 number, since 2×21011311323414² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21011311323419) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 23007487 + ... + 23903285.

It is an arithmetic number, because the mean of its divisors is an integer number (767991735000).

Almost surely, 2^{21011311323414} is an apocalyptic number.

21011311323414 is an abundant number, since it is smaller than the sum of its proper divisors (28140159716586).

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

21011311323414 is a wasteful number, since it uses less digits than its factorization.

21011311323414 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 918690 (or 918684 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

Adding to 21011311323414 its reverse (41432311311012), we get a palindrome (62443622634426).

The spelling of 21011311323414 in words is "twenty-one trillion, eleven billion, three hundred eleven million, three hundred twenty-three thousand, four hundred fourteen".