131211222023440 has 160 divisors (see below), whose sum is σ = 341153697265920. Its totient is φ = 46598765918208.

The previous prime is 131211222023407. The next prime is 131211222023489. The reversal of 131211222023440 is 44320222112131.

It is a junction number, because it is equal to n+sod(n) for n = 131211222023399 and 131211222023408.

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, 338842 + ... + 16203001.

It is an arithmetic number, because the mean of its divisors is an integer number (2132210607912).

Almost surely, 2^{131211222023440} is an apocalyptic number.

131211222023440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 131211222023440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (170576848632960).

131211222023440 is an abundant number, since it is smaller than the sum of its proper divisors (209942475242480).

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

131211222023440 is a wasteful number, since it uses less digits than its factorization.

131211222023440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16542161 (or 16542155 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 28.

Adding to 131211222023440 its reverse (44320222112131), we get a palindrome (175531444135571).

The spelling of 131211222023440 in words is "one hundred thirty-one trillion, two hundred eleven billion, two hundred twenty-two million, twenty-three thousand, four hundred forty".