21134434004210 has 32 divisors (see below), whose sum is σ = 38434700873520. Its totient is φ = 8366504988672.

The previous prime is 21134434004183. The next prime is 21134434004303. The reversal of 21134434004210 is 1240043443112.

It can be written as a sum of positive squares in 8 ways, for example, as 17923123412041 + 3211310592169 = 4233571^2 + 1792013^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 113957036 + ... + 114142344.

Almost surely, 2^{21134434004210} is an apocalyptic number.

21134434004210 is a deficient number, since it is larger than the sum of its proper divisors (17300266869310).

21134434004210 is a wasteful number, since it uses less digits than its factorization.

21134434004210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 302990.

The product of its (nonzero) digits is 9216, while the sum is 29.

Adding to 21134434004210 its reverse (1240043443112), we get a palindrome (22374477447322).

The spelling of 21134434004210 in words is "twenty-one trillion, one hundred thirty-four billion, four hundred thirty-four million, four thousand, two hundred ten".