21033110343 has 32 divisors (see below), whose sum is σ = 33926745600. Its totient is φ = 11334589056.

The previous prime is 21033110341. The next prime is 21033110353. The reversal of 21033110343 is 34301133012.

It is not a de Polignac number, because 21033110343 - 2¹ = 21033110341 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21033110341) 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, 375408 + ... + 427781.

It is an arithmetic number, because the mean of its divisors is an integer number (1060210800).

Almost surely, 2^21033110343 is an apocalyptic number.

21033110343 is a deficient number, since it is larger than the sum of its proper divisors (12893635257).

21033110343 is a wasteful number, since it uses less digits than its factorization.

21033110343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 803271.

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 21033110343 its reverse (34301133012), we get a palindrome (55334243355).

The spelling of 21033110343 in words is "twenty-one billion, thirty-three million, one hundred ten thousand, three hundred forty-three".