21143214411 has 32 divisors (see below), whose sum is σ = 31840128000. Its totient is φ = 12362138880.

The previous prime is 21143214403. The next prime is 21143214427. The reversal of 21143214411 is 11441234112.

It is a happy number.

It is not a de Polignac number, because 21143214411 - 2³ = 21143214403 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21143214431) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1261615 + ... + 1278263.

It is an arithmetic number, because the mean of its divisors is an integer number (995004000).

Almost surely, 2^21143214411 is an apocalyptic number.

21143214411 is a deficient number, since it is larger than the sum of its proper divisors (10696913589).

21143214411 is a wasteful number, since it uses less digits than its factorization.

21143214411 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18019.

The product of its digits is 768, while the sum is 24.

Adding to 21143214411 its reverse (11441234112), we get a palindrome (32584448523).

The spelling of 21143214411 in words is "twenty-one billion, one hundred forty-three million, two hundred fourteen thousand, four hundred eleven".