21113313143 has 6 divisors (see below), whose sum is σ = 22862345184. Its totient is φ = 19489211976.

The previous prime is 21113313139. The next prime is 21113313167. The reversal of 21113313143 is 34131331112.

It is not a de Polignac number, because 21113313143 - 2² = 21113313139 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21113313343) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 62465255 + ... + 62465592.

It is an arithmetic number, because the mean of its divisors is an integer number (3810390864).

Almost surely, 2^21113313143 is an apocalyptic number.

21113313143 is a deficient number, since it is larger than the sum of its proper divisors (1749032041).

21113313143 is a wasteful number, since it uses less digits than its factorization.

21113313143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124930873 (or 124930860 counting only the distinct ones).

The product of its digits is 648, while the sum is 23.

Adding to 21113313143 its reverse (34131331112), we get a palindrome (55244644255).

The spelling of 21113313143 in words is "twenty-one billion, one hundred thirteen million, three hundred thirteen thousand, one hundred forty-three".