200121120987 has 16 divisors (see below), whose sum is σ = 272274667008. Its totient is φ = 130715035200.

The previous prime is 200121120967. The next prime is 200121120989. The reversal of 200121120987 is 789021121002.

It is a de Polignac number, because none of the positive numbers 2^k-200121120987 is a prime.

It is not an unprimeable number, because it can be changed into a prime (200121120989) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2992743 + ... + 3058880.

It is an arithmetic number, because the mean of its divisors is an integer number (17017166688).

Almost surely, 2^200121120987 is an apocalyptic number.

200121120987 is a deficient number, since it is larger than the sum of its proper divisors (72153546021).

200121120987 is a wasteful number, since it uses less digits than its factorization.

200121120987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6051850.

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

Adding to 200121120987 its reverse (789021121002), we get a palindrome (989142241989).

The spelling of 200121120987 in words is "two hundred billion, one hundred twenty-one million, one hundred twenty thousand, nine hundred eighty-seven".