121451401240 has 32 divisors (see below), whose sum is σ = 294286088880. Its totient is φ = 44843594112.

The previous prime is 121451401229. The next prime is 121451401273. The reversal of 121451401240 is 42104154121.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 116779674 + ... + 116780713.

Almost surely, 2^121451401240 is an apocalyptic number.

121451401240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121451401240 is an abundant number, since it is smaller than the sum of its proper divisors (172834687640).

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

121451401240 is a wasteful number, since it uses less digits than its factorization.

121451401240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 233560411 (or 233560407 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 25.

Adding to 121451401240 its reverse (42104154121), we get a palindrome (163555555361).

The spelling of 121451401240 in words is "one hundred twenty-one billion, four hundred fifty-one million, four hundred one thousand, two hundred forty".