21130043334 has 16 divisors (see below), whose sum is σ = 42261881088. Its totient is φ = 7043048712.

The previous prime is 21130043329. The next prime is 21130043353. The reversal of 21130043334 is 43334003112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 115599 + ... + 235845.

It is an arithmetic number, because the mean of its divisors is an integer number (2641367568).

Almost surely, 2^21130043334 is an apocalyptic number.

21130043334 is an abundant number, since it is smaller than the sum of its proper divisors (21131837754).

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

21130043334 is a wasteful number, since it uses less digits than its factorization.

21130043334 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149539.

The product of its (nonzero) digits is 2592, while the sum is 24.

Adding to 21130043334 its reverse (43334003112), we get a palindrome (64464046446).

The spelling of 21130043334 in words is "twenty-one billion, one hundred thirty million, forty-three thousand, three hundred thirty-four".