231330213010221 has 16 divisors (see below), whose sum is σ = 349648904955840. Its totient is φ = 134864577624960.

The previous prime is 231330213010219. The next prime is 231330213010223. The reversal of 231330213010221 is 122010312033132.

It is an interprime number because it is at equal distance from previous prime (231330213010219) and next prime (231330213010223).

It is not a de Polignac number, because 231330213010221 - 2¹ = 231330213010219 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 231330213010191 and 231330213010200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231330213010223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 156093260400 + ... + 156093261881.

It is an arithmetic number, because the mean of its divisors is an integer number (21853056559740).

Almost surely, 2^{231330213010221} is an apocalyptic number.

It is an amenable number.

231330213010221 is a deficient number, since it is larger than the sum of its proper divisors (118318691945619).

231330213010221 is a wasteful number, since it uses less digits than its factorization.

231330213010221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 312186522316.

The product of its (nonzero) digits is 1296, while the sum is 24.

Adding to 231330213010221 its reverse (122010312033132), we get a palindrome (353340525043353).

The spelling of 231330213010221 in words is "two hundred thirty-one trillion, three hundred thirty billion, two hundred thirteen million, ten thousand, two hundred twenty-one".