21231011113 has 8 divisors (see below), whose sum is σ = 22865504256. Its totient is φ = 19596709200.

The previous prime is 21231011111. The next prime is 21231011117. The reversal of 21231011113 is 31111013212.

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 not a de Polignac number, because 21231011113 - 2¹ = 21231011111 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21231011111) 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, 252858 + ... + 326188.

It is an arithmetic number, because the mean of its divisors is an integer number (2858188032).

Almost surely, 2^21231011113 is an apocalyptic number.

It is an amenable number.

21231011113 is a deficient number, since it is larger than the sum of its proper divisors (1634493143).

21231011113 is a wasteful number, since it uses less digits than its factorization.

21231011113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95615.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 21231011113 its reverse (31111013212), we get a palindrome (52342024325).

The spelling of 21231011113 in words is "twenty-one billion, two hundred thirty-one million, eleven thousand, one hundred thirteen".