1220200011987 has 8 divisors (see below), whose sum is σ = 1774836381120. Its totient is φ = 739515158760.

The previous prime is 1220200011983. The next prime is 1220200012021. The reversal of 1220200011987 is 7891100020221.

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

It is not a de Polignac number, because 1220200011987 - 2² = 1220200011983 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33), and also a Moran number because the ratio is a prime number: 36975757939 = 1220200011987 / (1 + 2 + 2 + 0 + 2 + 0 + 0 + 0 + 1 + 1 + 9 + 8 + 7).

It is not an unprimeable number, because it can be changed into a prime (1220200011983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18487878937 + ... + 18487879002.

It is an arithmetic number, because the mean of its divisors is an integer number (221854547640).

Almost surely, 2^{1220200011987} is an apocalyptic number.

1220200011987 is a deficient number, since it is larger than the sum of its proper divisors (554636369133).

1220200011987 is a wasteful number, since it uses less digits than its factorization.

1220200011987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36975757953.

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

The spelling of 1220200011987 in words is "one trillion, two hundred twenty billion, two hundred million, eleven thousand, nine hundred eighty-seven".