131223101022220 has 24 divisors (see below), whose sum is σ = 276362657729424. Its totient is φ = 52337974583616.

The previous prime is 131223101022199. The next prime is 131223101022259. The reversal of 131223101022220 is 22220101322131.

It is a junction number, because it is equal to n+sod(n) for n = 131223101022191 and 131223101022200.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9454106967 + ... + 9454120846.

It is an arithmetic number, because the mean of its divisors is an integer number (11515110738726).

Almost surely, 2^{131223101022220} is an apocalyptic number.

131223101022220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131223101022220 is an abundant number, since it is smaller than the sum of its proper divisors (145139556707204).

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

131223101022220 is a wasteful number, since it uses less digits than its factorization.

131223101022220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18908228169 (or 18908228167 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 131223101022220 its reverse (22220101322131), we get a palindrome (153443202344351).

The spelling of 131223101022220 in words is "one hundred thirty-one trillion, two hundred twenty-three billion, one hundred one million, twenty-two thousand, two hundred twenty".