121424111205 has 16 divisors (see below), whose sum is σ = 204503766720. Its totient is φ = 61351129728.

The previous prime is 121424111201. The next prime is 121424111351. The reversal of 121424111205 is 502111424121.

It is not a de Polignac number, because 121424111205 - 2² = 121424111201 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121424111201) 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, 213024472 + ... + 213025041.

It is an arithmetic number, because the mean of its divisors is an integer number (12781485420).

Almost surely, 2^121424111205 is an apocalyptic number.

121424111205 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

121424111205 is a deficient number, since it is larger than the sum of its proper divisors (83079655515).

121424111205 is a wasteful number, since it uses less digits than its factorization.

121424111205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 426049540.

The product of its (nonzero) digits is 640, while the sum is 24.

Adding to 121424111205 its reverse (502111424121), we get a palindrome (623535535326).

The spelling of 121424111205 in words is "one hundred twenty-one billion, four hundred twenty-four million, one hundred eleven thousand, two hundred five".