21211142134 has 32 divisors (see below), whose sum is σ = 39385442880. Its totient is φ = 8342704512.

The previous prime is 21211142083. The next prime is 21211142149. The reversal of 21211142134 is 43124111212.

It is a congruent 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, 305349 + ... + 368320.

It is an arithmetic number, because the mean of its divisors is an integer number (1230795090).

Almost surely, 2^21211142134 is an apocalyptic number.

21211142134 is a deficient number, since it is larger than the sum of its proper divisors (18174300746).

21211142134 is a wasteful number, since it uses less digits than its factorization.

21211142134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 673864.

The product of its digits is 384, while the sum is 22.

Adding to 21211142134 its reverse (43124111212), we get a palindrome (64335253346).

The spelling of 21211142134 in words is "twenty-one billion, two hundred eleven million, one hundred forty-two thousand, one hundred thirty-four".