21141143231 has 32 divisors (see below), whose sum is σ = 24820992000. Its totient is φ = 17829479808.

The previous prime is 21141143207. The next prime is 21141143249. The reversal of 21141143231 is 13234114112.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21141143231 is a prime.

It is a super-2 number, since 2×21141143231² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21141143197 and 21141143206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21141143291) 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, 11595986 + ... + 11597808.

It is an arithmetic number, because the mean of its divisors is an integer number (775656000).

Almost surely, 2^21141143231 is an apocalyptic number.

21141143231 is a deficient number, since it is larger than the sum of its proper divisors (3679848769).

21141143231 is a wasteful number, since it uses less digits than its factorization.

21141143231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3503.

The product of its digits is 576, while the sum is 23.

Adding to 21141143231 its reverse (13234114112), we get a palindrome (34375257343).

The spelling of 21141143231 in words is "twenty-one billion, one hundred forty-one million, one hundred forty-three thousand, two hundred thirty-one".