21110354043 has 16 divisors (see below), whose sum is σ = 28798671360. Its totient is φ = 13748900256.

The previous prime is 21110354011. The next prime is 21110354059. The reversal of 21110354043 is 34045301112.

It is a happy number.

It is not a de Polignac number, because 21110354043 - 2⁵ = 21110354011 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21110304043) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 59728 + ... + 213981.

It is an arithmetic number, because the mean of its divisors is an integer number (1799916960).

Almost surely, 2^21110354043 is an apocalyptic number.

21110354043 is a deficient number, since it is larger than the sum of its proper divisors (7688317317).

21110354043 is a wasteful number, since it uses less digits than its factorization.

21110354043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274306.

The product of its (nonzero) digits is 1440, while the sum is 24.

Adding to 21110354043 its reverse (34045301112), we get a palindrome (55155655155).

The spelling of 21110354043 in words is "twenty-one billion, one hundred ten million, three hundred fifty-four thousand, forty-three".