131121403140 has 96 divisors (see below), whose sum is σ = 451864546560. Its totient is φ = 27665174016.

The previous prime is 131121403051. The next prime is 131121403141. The reversal of 131121403140 is 41304121131.

It is a super-2 number, since 2×131121403140² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (131121403141) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12001995 + ... + 12012914.

It is an arithmetic number, because the mean of its divisors is an integer number (4706922360).

Almost surely, 2^131121403140 is an apocalyptic number.

131121403140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131121403140 is an abundant number, since it is smaller than the sum of its proper divisors (320743143420).

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

131121403140 is a wasteful number, since it uses less digits than its factorization.

131121403140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24014941 (or 24014939 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 131121403140 its reverse (41304121131), we get a palindrome (172425524271).

The spelling of 131121403140 in words is "one hundred thirty-one billion, one hundred twenty-one million, four hundred three thousand, one hundred forty".