131123022220 has 24 divisors (see below), whose sum is σ = 275647325184. Its totient is φ = 52394165376.

The previous prime is 131123022209. The next prime is 131123022257. The reversal of 131123022220 is 22220321131.

It is a super-2 number, since 2×131123022220² (a number of 23 digits) contains 22 as substring.

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, 3420684 + ... + 3458803.

It is an arithmetic number, because the mean of its divisors is an integer number (11485305216).

Almost surely, 2^131123022220 is an apocalyptic number.

131123022220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131123022220 is an abundant number, since it is smaller than the sum of its proper divisors (144524302964).

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

131123022220 is a wasteful number, since it uses less digits than its factorization.

131123022220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6880449 (or 6880447 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 131123022220 its reverse (22220321131), we get a palindrome (153343343351).

The spelling of 131123022220 in words is "one hundred thirty-one billion, one hundred twenty-three million, twenty-two thousand, two hundred twenty".