21034231131 has 8 divisors (see below), whose sum is σ = 28068998224. Its totient is φ = 14011142400.

The previous prime is 21034231129. The next prime is 21034231157. The reversal of 21034231131 is 13113243012.

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

It is not a de Polignac number, because 21034231131 - 2¹ = 21034231129 is a prime.

It is a super-2 number, since 2×21034231131² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21034231098 and 21034231107.

It is not an unprimeable number, because it can be changed into a prime (21034231111) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2915386 + ... + 2922591.

It is an arithmetic number, because the mean of its divisors is an integer number (3508624778).

Almost surely, 2^21034231131 is an apocalyptic number.

21034231131 is a deficient number, since it is larger than the sum of its proper divisors (7034767093).

21034231131 is a wasteful number, since it uses less digits than its factorization.

21034231131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5839181.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 21034231131 its reverse (13113243012), we get a palindrome (34147474143).

The spelling of 21034231131 in words is "twenty-one billion, thirty-four million, two hundred thirty-one thousand, one hundred thirty-one".