21243123114 has 24 divisors (see below), whose sum is σ = 43547791200. Its totient is φ = 6908329440.

The previous prime is 21243123103. The next prime is 21243123133. The reversal of 21243123114 is 41132134212.

It is a super-2 number, since 2×21243123114² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1043014 + ... + 1063185.

It is an arithmetic number, because the mean of its divisors is an integer number (1814491300).

Almost surely, 2^21243123114 is an apocalyptic number.

21243123114 is an abundant number, since it is smaller than the sum of its proper divisors (22304668086).

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

21243123114 is a wasteful number, since it uses less digits than its factorization.

21243123114 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2106286 (or 2106245 counting only the distinct ones).

The product of its digits is 1152, while the sum is 24.

Adding to 21243123114 its reverse (41132134212), we get a palindrome (62375257326).

The spelling of 21243123114 in words is "twenty-one billion, two hundred forty-three million, one hundred twenty-three thousand, one hundred fourteen".