21231121431041 has 8 divisors (see below), whose sum is σ = 22348908141120. Its totient is φ = 20113370647632.

The previous prime is 21231121431029. The next prime is 21231121431049. The reversal of 21231121431041 is 14013412113212.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21231121431041 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21231121431041.

It is not an unprimeable number, because it can be changed into a prime (21231121431049) 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, 7764410 + ... + 10136483.

It is an arithmetic number, because the mean of its divisors is an integer number (2793613517640).

Almost surely, 2^{21231121431041} is an apocalyptic number.

It is an amenable number.

21231121431041 is a deficient number, since it is larger than the sum of its proper divisors (1117786710079).

21231121431041 is a wasteful number, since it uses less digits than its factorization.

21231121431041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17963335.

The product of its (nonzero) digits is 1152, while the sum is 26.

Adding to 21231121431041 its reverse (14013412113212), we get a palindrome (35244533544253).

The spelling of 21231121431041 in words is "twenty-one trillion, two hundred thirty-one billion, one hundred twenty-one million, four hundred thirty-one thousand, forty-one".