221002201987 has 8 divisors (see below), whose sum is σ = 254809113696. Its totient is φ = 187754082432.

The previous prime is 221002201957. The next prime is 221002201991. The reversal of 221002201987 is 789102200122.

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

It is not a de Polignac number, because 221002201987 - 2⁷ = 221002201859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221002201957) 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, 139697188 + ... + 139698769.

It is an arithmetic number, because the mean of its divisors is an integer number (31851139212).

Almost surely, 2^221002201987 is an apocalyptic number.

221002201987 is a deficient number, since it is larger than the sum of its proper divisors (33806911709).

221002201987 is a wasteful number, since it uses less digits than its factorization.

221002201987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 279396077.

The product of its (nonzero) digits is 8064, while the sum is 34.

The spelling of 221002201987 in words is "two hundred twenty-one billion, two million, two hundred one thousand, nine hundred eighty-seven".