12121215743 has 8 divisors (see below), whose sum is σ = 14918419488. Its totient is φ = 9590412384.

The previous prime is 12121215703. The next prime is 12121215767. The reversal of 12121215743 is 34751212121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12121215743 - 2¹⁸ = 12120953599 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12121215703) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66599996 + ... + 66600177.

It is an arithmetic number, because the mean of its divisors is an integer number (1864802436).

Almost surely, 2^12121215743 is an apocalyptic number.

12121215743 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

12121215743 is a deficient number, since it is larger than the sum of its proper divisors (2797203745).

12121215743 is a wasteful number, since it uses less digits than its factorization.

12121215743 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133200193.

The product of its digits is 3360, while the sum is 29.

Adding to 12121215743 its reverse (34751212121), we get a palindrome (46872427864).

The spelling of 12121215743 in words is "twelve billion, one hundred twenty-one million, two hundred fifteen thousand, seven hundred forty-three".