131211211121340 has 96 divisors (see below), whose sum is σ = 420518871682560. Its totient is φ = 29945205678336.

The previous prime is 131211211121339. The next prime is 131211211121357. The reversal of 131211211121340 is 43121112112131.

It is a self number, because there is not a number n which added to its sum of digits gives 131211211121340.

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, 238935270 + ... + 239483789.

It is an arithmetic number, because the mean of its divisors is an integer number (4380404913360).

Almost surely, 2^{131211211121340} is an apocalyptic number.

131211211121340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131211211121340 is an abundant number, since it is smaller than the sum of its proper divisors (289307660561220).

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

131211211121340 is a wasteful number, since it uses less digits than its factorization.

131211211121340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 478419731 (or 478419729 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 24.

Adding to 131211211121340 its reverse (43121112112131), we get a palindrome (174332323233471).

The spelling of 131211211121340 in words is "one hundred thirty-one trillion, two hundred eleven billion, two hundred eleven million, one hundred twenty-one thousand, three hundred forty".