12121005011445 has 32 divisors (see below), whose sum is σ = 23507403661440. Its totient is φ = 5876850913920.

The previous prime is 12121005011387. The next prime is 12121005011449. The reversal of 12121005011445 is 54411050012121.

12121005011445 is a `hidden beast` number, since 1 + 2 + 1 + 2 + 10 + 0 + 501 + 144 + 5 = 666.

It is not a de Polignac number, because 12121005011445 - 2⁷ = 12121005011317 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12121005011449) 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, 4081144984 + ... + 4081147953.

It is an arithmetic number, because the mean of its divisors is an integer number (734606364420).

Almost surely, 2^{12121005011445} is an apocalyptic number.

12121005011445 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12121005011445 is a deficient number, since it is larger than the sum of its proper divisors (11386398649995).

12121005011445 is a wasteful number, since it uses less digits than its factorization.

12121005011445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8162292962 (or 8162292956 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 27.

Adding to 12121005011445 its reverse (54411050012121), we get a palindrome (66532055023566).

The spelling of 12121005011445 in words is "twelve trillion, one hundred twenty-one billion, five million, eleven thousand, four hundred forty-five".