21042210134 has 16 divisors (see below), whose sum is σ = 35363322576. Its totient is φ = 9306136800.

The previous prime is 21042210061. The next prime is 21042210157. The reversal of 21042210134 is 43101224012.

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, 12924377 + ... + 12926004.

It is an arithmetic number, because the mean of its divisors is an integer number (2210207661).

Almost surely, 2^21042210134 is an apocalyptic number.

21042210134 is a deficient number, since it is larger than the sum of its proper divisors (14321112442).

21042210134 is a wasteful number, since it uses less digits than its factorization.

21042210134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25850431.

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 21042210134 its reverse (43101224012), we get a palindrome (64143434146).

The spelling of 21042210134 in words is "twenty-one billion, forty-two million, two hundred ten thousand, one hundred thirty-four".