121140051405 has 16 divisors (see below), whose sum is σ = 193832478144. Its totient is φ = 64605228800.

The previous prime is 121140051323. The next prime is 121140051481. The reversal of 121140051405 is 504150041121.

It is not a de Polignac number, because 121140051405 - 2¹¹ = 121140049357 is a prime.

It is a super-3 number, since 3×121140051405³ (a number of 34 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 210277 + ... + 535253.

It is an arithmetic number, because the mean of its divisors is an integer number (12114529884).

Almost surely, 2^121140051405 is an apocalyptic number.

121140051405 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

121140051405 is a deficient number, since it is larger than the sum of its proper divisors (72692426739).

121140051405 is a wasteful number, since it uses less digits than its factorization.

121140051405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 349836.

The product of its (nonzero) digits is 800, while the sum is 24.

Adding to 121140051405 its reverse (504150041121), we get a palindrome (625290092526).

The spelling of 121140051405 in words is "one hundred twenty-one billion, one hundred forty million, fifty-one thousand, four hundred five".