21301232331 has 8 divisors (see below), whose sum is σ = 28480757760. Its totient is φ = 14161264232.

The previous prime is 21301232317. The next prime is 21301232363. The reversal of 21301232331 is 13323210312.

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 21301232331 - 2¹⁷ = 21301101259 is a prime.

It is a super-2 number, since 2×21301232331² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21301232298 and 21301232307.

It is not an unprimeable number, because it can be changed into a prime (21301232311) 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, 9888075 + ... + 9890228.

It is an arithmetic number, because the mean of its divisors is an integer number (3560094720).

Almost surely, 2^21301232331 is an apocalyptic number.

21301232331 is a deficient number, since it is larger than the sum of its proper divisors (7179525429).

21301232331 is a wasteful number, since it uses less digits than its factorization.

21301232331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19778665.

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 21301232331 its reverse (13323210312), we get a palindrome (34624442643).

The spelling of 21301232331 in words is "twenty-one billion, three hundred one million, two hundred thirty-two thousand, three hundred thirty-one".