21231001100231 has 8 divisors (see below), whose sum is σ = 22865967952800. Its totient is φ = 19596293236512.

The previous prime is 21231001100213. The next prime is 21231001100251. The reversal of 21231001100231 is 13200110013212.

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 21231001100231 - 2²² = 21230996905927 is a prime.

It is a super-2 number, since 2×21231001100231² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21231001100201) 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, 64576931 + ... + 64904868.

It is an arithmetic number, because the mean of its divisors is an integer number (2858245994100).

Almost surely, 2^{21231001100231} is an apocalyptic number.

21231001100231 is a deficient number, since it is larger than the sum of its proper divisors (1634966852569).

21231001100231 is a wasteful number, since it uses less digits than its factorization.

21231001100231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129494425.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 21231001100231 its reverse (13200110013212), we get a palindrome (34431111113443).

The spelling of 21231001100231 in words is "twenty-one trillion, two hundred thirty-one billion, one million, one hundred thousand, two hundred thirty-one".