21112124343 has 32 divisors (see below), whose sum is σ = 28718456832. Its totient is φ = 13793868000.

The previous prime is 21112124291. The next prime is 21112124377. The reversal of 21112124343 is 34342121112.

It is not a de Polignac number, because 21112124343 - 2⁶ = 21112124279 is a prime.

It is a super-4 number, since 4×21112124343⁴ (a number of 42 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21182124343) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15443446 + ... + 15444812.

It is an arithmetic number, because the mean of its divisors is an integer number (897451776).

Almost surely, 2^21112124343 is an apocalyptic number.

21112124343 is a deficient number, since it is larger than the sum of its proper divisors (7606332489).

21112124343 is a wasteful number, since it uses less digits than its factorization.

21112124343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1955.

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

Adding to 21112124343 its reverse (34342121112), we get a palindrome (55454245455).

The spelling of 21112124343 in words is "twenty-one billion, one hundred twelve million, one hundred twenty-four thousand, three hundred forty-three".