131121140 has 24 divisors (see below), whose sum is σ = 279129480. Its totient is φ = 51729408.

The previous prime is 131121131. The next prime is 131121149. The reversal of 131121140 is 41121131.

It is an interprime number because it is at equal distance from previous prime (131121131) and next prime (131121149).

It can be written as a sum of positive squares in 4 ways, for example, as 43586404 + 87534736 = 6602^2 + 9356^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131121149) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43445 + ... + 46364.

It is an arithmetic number, because the mean of its divisors is an integer number (11630395).

Almost surely, 2^131121140 is an apocalyptic number.

131121140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131121140 is an abundant number, since it is smaller than the sum of its proper divisors (148008340).

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

131121140 is a wasteful number, since it uses less digits than its factorization.

131121140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89891 (or 89889 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 14.

The square root of 131121140 is about 11450.8139448687. The cubic root of 131121140 is about 508.0318092385.

Adding to 131121140 its reverse (41121131), we get a palindrome (172242271).

Subtracting from 131121140 its reverse (41121131), we obtain a palindrome (90000009).

The spelling of 131121140 in words is "one hundred thirty-one million, one hundred twenty-one thousand, one hundred forty".