21000143131 has 8 divisors (see below), whose sum is σ = 22933297584. Its totient is φ = 19070997120.

The previous prime is 21000143081. The next prime is 21000143149. The reversal of 21000143131 is 13134100012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21000143131 - 2²⁷ = 20865925403 is a prime.

It is a super-2 number, since 2×21000143131² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21000143531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 991146 + ... + 1012111.

It is an arithmetic number, because the mean of its divisors is an integer number (2866662198).

Almost surely, 2^21000143131 is an apocalyptic number.

21000143131 is a deficient number, since it is larger than the sum of its proper divisors (1933154453).

21000143131 is a wasteful number, since it uses less digits than its factorization.

21000143131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2004221.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 21000143131 its reverse (13134100012), we get a palindrome (34134243143).

The spelling of 21000143131 in words is "twenty-one billion, one hundred forty-three thousand, one hundred thirty-one".