21000134302 has 16 divisors (see below), whose sum is σ = 36003317760. Its totient is φ = 8999285688.

The previous prime is 21000134299. The next prime is 21000134341. The reversal of 21000134302 is 20343100012.

It is a happy number.

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, 123699 + ... + 239377.

It is an arithmetic number, because the mean of its divisors is an integer number (2250207360).

Almost surely, 2^21000134302 is an apocalyptic number.

21000134302 is a deficient number, since it is larger than the sum of its proper divisors (15003183458).

21000134302 is a wasteful number, since it uses less digits than its factorization.

21000134302 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128655.

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 21000134302 its reverse (20343100012), we get a palindrome (41343234314).

The spelling of 21000134302 in words is "twenty-one billion, one hundred thirty-four thousand, three hundred two".