131101131220 has 24 divisors (see below), whose sum is σ = 275737924224. Its totient is φ = 52359395616.

The previous prime is 131101131191. The next prime is 131101131257. The reversal of 131101131220 is 22131101131.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 131101131194 and 131101131203.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5052792 + ... + 5078671.

It is an arithmetic number, because the mean of its divisors is an integer number (11489080176).

Almost surely, 2^131101131220 is an apocalyptic number.

131101131220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131101131220 is an abundant number, since it is smaller than the sum of its proper divisors (144636793004).

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

131101131220 is a wasteful number, since it uses less digits than its factorization.

131101131220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10132119 (or 10132117 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 131101131220 its reverse (22131101131), we get a palindrome (153232232351).

The spelling of 131101131220 in words is "one hundred thirty-one billion, one hundred one million, one hundred thirty-one thousand, two hundred twenty".