121412400140 has 48 divisors (see below), whose sum is σ = 262176503232. Its totient is φ = 47194742016.

The previous prime is 121412400097. The next prime is 121412400143. The reversal of 121412400140 is 41004214121.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (121412400143) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 509342 + ... + 708698.

It is an arithmetic number, because the mean of its divisors is an integer number (5462010484).

Almost surely, 2^121412400140 is an apocalyptic number.

121412400140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121412400140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (131088251616).

121412400140 is an abundant number, since it is smaller than the sum of its proper divisors (140764103092).

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

121412400140 is a wasteful number, since it uses less digits than its factorization.

121412400140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200226 (or 200224 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 121412400140 its reverse (41004214121), we get a palindrome (162416614261).

The spelling of 121412400140 in words is "one hundred twenty-one billion, four hundred twelve million, four hundred thousand, one hundred forty".