12122031405 has 32 divisors (see below), whose sum is σ = 21201689088. Its totient is φ = 5865339200.

The previous prime is 12122031371. The next prime is 12122031409. The reversal of 12122031405 is 50413022121.

12122031405 is nontrivially palindromic in base 2.

It is not a de Polignac number, because 12122031405 - 2²³ = 12113642797 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12122031409) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6202 + ... + 155828.

It is an arithmetic number, because the mean of its divisors is an integer number (662552784).

Almost surely, 2^12122031405 is an apocalyptic number.

12122031405 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12122031405 is a deficient number, since it is larger than the sum of its proper divisors (9079657683).

12122031405 is a wasteful number, since it uses less digits than its factorization.

12122031405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150137.

The product of its (nonzero) digits is 480, while the sum is 21.

Adding to 12122031405 its reverse (50413022121), we get a palindrome (62535053526).

The spelling of 12122031405 in words is "twelve billion, one hundred twenty-two million, thirty-one thousand, four hundred five".