131220110 has 32 divisors (see below), whose sum is σ = 285819840. Its totient is φ = 42342912.

The previous prime is 131220101. The next prime is 131220143. The reversal of 131220110 is 11022131.

It is a junction number, because it is equal to n+sod(n) for n = 131220091 and 131220100.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53945 + ... + 56324.

It is an arithmetic number, because the mean of its divisors is an integer number (8931870).

Almost surely, 2^131220110 is an apocalyptic number.

131220110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

131220110 is an abundant number, since it is smaller than the sum of its proper divisors (154599730).

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

131220110 is a wasteful number, since it uses less digits than its factorization.

131220110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110300.

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 131220110 is about 11455.1346565634. The cubic root of 131220110 is about 508.1595975902.

Adding to 131220110 its reverse (11022131), we get a palindrome (142242241).

The spelling of 131220110 in words is "one hundred thirty-one million, two hundred twenty thousand, one hundred ten".