21134401203 has 16 divisors (see below), whose sum is σ = 28314754560. Its totient is φ = 14021875296.

The previous prime is 21134401199. The next prime is 21134401213. The reversal of 21134401203 is 30210443112.

It is not a de Polignac number, because 21134401203 - 2² = 21134401199 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21134401203.

It is not an unprimeable number, because it can be changed into a prime (21134401213) 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, 2315613 + ... + 2324721.

It is an arithmetic number, because the mean of its divisors is an integer number (1769672160).

Almost surely, 2^21134401203 is an apocalyptic number.

21134401203 is a deficient number, since it is larger than the sum of its proper divisors (7180353357).

21134401203 is a wasteful number, since it uses less digits than its factorization.

21134401203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12746.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 21134401203 its reverse (30210443112), we get a palindrome (51344844315).

The spelling of 21134401203 in words is "twenty-one billion, one hundred thirty-four million, four hundred one thousand, two hundred three".