12122151345 has 24 divisors (see below), whose sum is σ = 21080195136. Its totient is φ = 6444080928.

The previous prime is 12122151343. The next prime is 12122151383. The reversal of 12122151345 is 54315122121.

It is a happy number.

12122151345 is a `hidden beast` number, since 121 + 2 + 21 + 513 + 4 + 5 = 666.

It is not a de Polignac number, because 12122151345 - 2¹ = 12122151343 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12122151343) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 424917 + ... + 452546.

It is an arithmetic number, because the mean of its divisors is an integer number (878341464).

Almost surely, 2^12122151345 is an apocalyptic number.

12122151345 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12122151345 is a deficient number, since it is larger than the sum of its proper divisors (8958043791).

12122151345 is a wasteful number, since it uses less digits than its factorization.

12122151345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 877781 (or 877778 counting only the distinct ones).

The product of its digits is 2400, while the sum is 27.

Adding to 12122151345 its reverse (54315122121), we get a palindrome (66437273466).

The spelling of 12122151345 in words is "twelve billion, one hundred twenty-two million, one hundred fifty-one thousand, three hundred forty-five".