121431140 has 24 divisors (see below), whose sum is σ = 260937600. Its totient is φ = 47442528.

The previous prime is 121431103. The next prime is 121431157. The reversal of 121431140 is 41134121.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69740 + ... + 71459.

It is an arithmetic number, because the mean of its divisors is an integer number (10872400).

Almost surely, 2^121431140 is an apocalyptic number.

121431140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121431140 is an abundant number, since it is smaller than the sum of its proper divisors (139506460).

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

121431140 is a wasteful number, since it uses less digits than its factorization.

121431140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141251 (or 141249 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 121431140 is about 11019.5798468000. The cubic root of 121431140 is about 495.1955014585.

Adding to 121431140 its reverse (41134121), we get a palindrome (162565261).

The spelling of 121431140 in words is "one hundred twenty-one million, four hundred thirty-one thousand, one hundred forty".