12121552467407 has 4 divisors (see below), whose sum is σ = 12759528913080. Its totient is φ = 11483576021736.

The previous prime is 12121552467403. The next prime is 12121552467481. The reversal of 12121552467407 is 70476425512121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12121552467407 - 2² = 12121552467403 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12121552467403) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 318988222808 + ... + 318988222845.

It is an arithmetic number, because the mean of its divisors is an integer number (3189882228270).

Almost surely, 2^{12121552467407} is an apocalyptic number.

12121552467407 is a deficient number, since it is larger than the sum of its proper divisors (637976445673).

12121552467407 is an equidigital number, since it uses as much as digits as its factorization.

12121552467407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 637976445672.

The product of its (nonzero) digits is 940800, while the sum is 47.

Adding to 12121552467407 its reverse (70476425512121), we get a palindrome (82597977979528).

The spelling of 12121552467407 in words is "twelve trillion, one hundred twenty-one billion, five hundred fifty-two million, four hundred sixty-seven thousand, four hundred seven".