131103121220 has 48 divisors (see below), whose sum is σ = 279998933760. Its totient is φ = 51555069696.

The previous prime is 131103121189. The next prime is 131103121229. The reversal of 131103121220 is 22121301131.

It is not an unprimeable number, because it can be changed into a prime (131103121229) 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, 190079 + ... + 546201.

It is an arithmetic number, because the mean of its divisors is an integer number (5833311120).

Almost surely, 2^131103121220 is an apocalyptic number.

131103121220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131103121220 is an abundant number, since it is smaller than the sum of its proper divisors (148895812540).

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

131103121220 is a wasteful number, since it uses less digits than its factorization.

131103121220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 356444 (or 356442 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 131103121220 its reverse (22121301131), we get a palindrome (153224422351).

The spelling of 131103121220 in words is "one hundred thirty-one billion, one hundred three million, one hundred twenty-one thousand, two hundred twenty".