131111123312220 has 24 divisors (see below), whose sum is σ = 367111145274384. Its totient is φ = 34962966216576.

The previous prime is 131111123312219. The next prime is 131111123312237. The reversal of 131111123312220 is 22213321111131.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1092592694209 + ... + 1092592694328.

It is an arithmetic number, because the mean of its divisors is an integer number (15296297719766).

Almost surely, 2^{131111123312220} is an apocalyptic number.

131111123312220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131111123312220 is an abundant number, since it is smaller than the sum of its proper divisors (236000021962164).

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

131111123312220 is a wasteful number, since it uses less digits than its factorization.

131111123312220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2185185388549 (or 2185185388547 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 24.

Adding to 131111123312220 its reverse (22213321111131), we get a palindrome (153324444423351).

The spelling of 131111123312220 in words is "one hundred thirty-one trillion, one hundred eleven billion, one hundred twenty-three million, three hundred twelve thousand, two hundred twenty".