12120528892487 has 4 divisors (see below), whose sum is σ = 12325961585640. Its totient is φ = 11915096199336.

The previous prime is 12120528892471. The next prime is 12120528892489. The reversal of 12120528892487 is 78429882502121.

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 12120528892487 - 2⁴ = 12120528892471 is a prime.

It is a super-2 number, since 2×12120528892487² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (59), and also a Moran number because the ratio is a prime number: 205432693093 = 12120528892487 / (1 + 2 + 1 + 2 + 0 + 5 + 2 + 8 + 8 + 9 + 2 + 4 + 8 + 7).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12120528892489) 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, 102716346488 + ... + 102716346605.

It is an arithmetic number, because the mean of its divisors is an integer number (3081490396410).

Almost surely, 2^{12120528892487} is an apocalyptic number.

12120528892487 is a deficient number, since it is larger than the sum of its proper divisors (205432693153).

12120528892487 is an equidigital number, since it uses as much as digits as its factorization.

12120528892487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205432693152.

The product of its (nonzero) digits is 10321920, while the sum is 59.

The spelling of 12120528892487 in words is "twelve trillion, one hundred twenty billion, five hundred twenty-eight million, eight hundred ninety-two thousand, four hundred eighty-seven".