21134123210 has 32 divisors (see below), whose sum is σ = 39282278400. Its totient is φ = 8178094080.

The previous prime is 21134123209. The next prime is 21134123221. The reversal of 21134123210 is 1232143112.

It is a Curzon number.

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, 1021751 + ... + 1042229.

It is an arithmetic number, because the mean of its divisors is an integer number (1227571200).

Almost surely, 2^21134123210 is an apocalyptic number.

21134123210 is a deficient number, since it is larger than the sum of its proper divisors (18148155190).

21134123210 is a wasteful number, since it uses less digits than its factorization.

21134123210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23846.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 21134123210 its reverse (1232143112), we get a palindrome (22366266322).

The spelling of 21134123210 in words is "twenty-one billion, one hundred thirty-four million, one hundred twenty-three thousand, two hundred ten".