231321212102 has 4 divisors (see below), whose sum is σ = 346981818156. Its totient is φ = 115660606050.

The previous prime is 231321212081. The next prime is 231321212117. The reversal of 231321212102 is 201212123132.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57830303024 + ... + 57830303027.

It is an arithmetic number, because the mean of its divisors is an integer number (86745454539).

Almost surely, 2^231321212102 is an apocalyptic number.

231321212102 is a deficient number, since it is larger than the sum of its proper divisors (115660606054).

231321212102 is a wasteful number, since it uses less digits than its factorization.

231321212102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115660606053.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 231321212102 its reverse (201212123132), we get a palindrome (432533335234).

The spelling of 231321212102 in words is "two hundred thirty-one billion, three hundred twenty-one million, two hundred twelve thousand, one hundred two".