131211323320 has 128 divisors (see below), whose sum is σ = 373567541760. Its totient is φ = 40286568960.

The previous prime is 131211323279. The next prime is 131211323351. The reversal of 131211323320 is 23323112131.

It is a super-2 number, since 2×131211323320² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 131211323291 and 131211323300.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 111559 + ... + 524278.

It is an arithmetic number, because the mean of its divisors is an integer number (2918496420).

Almost surely, 2^131211323320 is an apocalyptic number.

131211323320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131211323320 is an abundant number, since it is smaller than the sum of its proper divisors (242356218440).

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

131211323320 is a wasteful number, since it uses less digits than its factorization.

131211323320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 635933 (or 635929 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 131211323320 its reverse (23323112131), we get a palindrome (154534435451).

The spelling of 131211323320 in words is "one hundred thirty-one billion, two hundred eleven million, three hundred twenty-three thousand, three hundred twenty".