1200122001987 has 8 divisors (see below), whose sum is σ = 1600364410704. Its totient is φ = 799980463968.

The previous prime is 1200122001983. The next prime is 1200122001989. The reversal of 1200122001987 is 7891002210021.

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

It is not a de Polignac number, because 1200122001987 - 2² = 1200122001983 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1200122001983) 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, 25189908 + ... + 25237505.

It is an arithmetic number, because the mean of its divisors is an integer number (200045551338).

Almost surely, 2^{1200122001987} is an apocalyptic number.

1200122001987 is a deficient number, since it is larger than the sum of its proper divisors (400242408717).

1200122001987 is an equidigital number, since it uses as much as digits as its factorization.

1200122001987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50435349.

The product of its (nonzero) digits is 4032, while the sum is 33.

The spelling of 1200122001987 in words is "one trillion, two hundred billion, one hundred twenty-two million, one thousand, nine hundred eighty-seven".