231220121223102 has 32 divisors (see below), whose sum is σ = 520753821410304. Its totient is φ = 67806487161600.

The previous prime is 231220121223089. The next prime is 231220121223109. The reversal of 231220121223102 is 201322121022132.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231220121223109) 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, 56505403923 + ... + 56505408014.

It is an arithmetic number, because the mean of its divisors is an integer number (16273556919072).

Almost surely, 2^{231220121223102} is an apocalyptic number.

231220121223102 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

231220121223102 is an abundant number, since it is smaller than the sum of its proper divisors (289533700187202).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

231220121223102 is a wasteful number, since it uses less digits than its factorization.

231220121223102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113010811984.

The product of its (nonzero) digits is 1152, while the sum is 24.

Adding to 231220121223102 its reverse (201322121022132), we get a palindrome (432542242245234).

The spelling of 231220121223102 in words is "two hundred thirty-one trillion, two hundred twenty billion, one hundred twenty-one million, two hundred twenty-three thousand, one hundred two".