131212001320420 has 12 divisors (see below), whose sum is σ = 275545202772924. Its totient is φ = 52484800528160.

The previous prime is 131212001320369. The next prime is 131212001320447. The reversal of 131212001320420 is 24023100212131.

It can be written as a sum of positive squares in 2 ways, for example, as 34913421102564 + 96298580217856 = 5908758^2 + 9813184^2 .

It is a junction number, because it is equal to n+sod(n) for n = 131212001320391 and 131212001320400.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3280300032991 + ... + 3280300033030.

It is an arithmetic number, because the mean of its divisors is an integer number (22962100231077).

Almost surely, 2^{131212001320420} is an apocalyptic number.

131212001320420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131212001320420 is an abundant number, since it is smaller than the sum of its proper divisors (144333201452504).

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

131212001320420 is a wasteful number, since it uses less digits than its factorization.

131212001320420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6560600066030 (or 6560600066028 counting only the distinct ones).

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

Adding to 131212001320420 its reverse (24023100212131), we get a palindrome (155235101532551).

The spelling of 131212001320420 in words is "one hundred thirty-one trillion, two hundred twelve billion, one million, three hundred twenty thousand, four hundred twenty".