211000221988 has 48 divisors (see below), whose sum is σ = 392674625280. Its totient is φ = 98862419456.

The previous prime is 211000221959. The next prime is 211000221997. The reversal of 211000221988 is 889122000112.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16959306 + ... + 16971742.

It is an arithmetic number, because the mean of its divisors is an integer number (8180721360).

Almost surely, 2^211000221988 is an apocalyptic number.

It is an amenable number.

211000221988 is a deficient number, since it is larger than the sum of its proper divisors (181674403292).

211000221988 is a wasteful number, since it uses less digits than its factorization.

211000221988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13524 (or 13522 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 34.

The spelling of 211000221988 in words is "two hundred eleven billion, two hundred twenty-one thousand, nine hundred eighty-eight".