12121200999487 has 2 divisors, whose sum is σ = 12121200999488. Its totient is φ = 12121200999486.

The previous prime is 12121200999433. The next prime is 12121200999499. The reversal of 12121200999487 is 78499900212121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12121200999487 - 2³⁵ = 12086841261119 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12121204999487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6060600499743 + 6060600499744.

It is an arithmetic number, because the mean of its divisors is an integer number (6060600499744).

Almost surely, 2^{12121200999487} is an apocalyptic number.

12121200999487 is a deficient number, since it is larger than the sum of its proper divisors (1).

12121200999487 is an equidigital number, since it uses as much as digits as its factorization.

12121200999487 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1306368, while the sum is 55.

The spelling of 12121200999487 in words is "twelve trillion, one hundred twenty-one billion, two hundred million, nine hundred ninety-nine thousand, four hundred eighty-seven".