121540111426 has 16 divisors (see below), whose sum is σ = 183836443320. Its totient is φ = 60262241920.

The previous prime is 121540111403. The next prime is 121540111463. The reversal of 121540111426 is 624111045121.

It can be written as a sum of positive squares in 4 ways, for example, as 121539390625 + 720801 = 348625^2 + 849^2 .

It is a junction number, because it is equal to n+sod(n) for n = 121540111394 and 121540111403.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22140 + ... + 493528.

Almost surely, 2^121540111426 is an apocalyptic number.

121540111426 is a deficient number, since it is larger than the sum of its proper divisors (62296331894).

121540111426 is a wasteful number, since it uses less digits than its factorization.

121540111426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 472469.

The product of its (nonzero) digits is 1920, while the sum is 28.

Adding to 121540111426 its reverse (624111045121), we get a palindrome (745651156547).

The spelling of 121540111426 in words is "one hundred twenty-one billion, five hundred forty million, one hundred eleven thousand, four hundred twenty-six".