211821199536 has 20 divisors (see below), whose sum is σ = 547204765592. Its totient is φ = 70607066496.

The previous prime is 211821199529. The next prime is 211821199549. The reversal of 211821199536 is 635991128112.

It is a hoax number, since the sum of its digits (48) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (48), and also a Moran number because the ratio is a prime number: 4412941657 = 211821199536 / (2 + 1 + 1 + 8 + 2 + 1 + 1 + 9 + 9 + 5 + 3 + 6).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2206470781 + ... + 2206470876.

Almost surely, 2^211821199536 is an apocalyptic number.

It is an amenable number.

211821199536 is an abundant number, since it is smaller than the sum of its proper divisors (335383566056).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

211821199536 is a wasteful number, since it uses less digits than its factorization.

211821199536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4412941668 (or 4412941662 counting only the distinct ones).

The product of its digits is 233280, while the sum is 48.

The spelling of 211821199536 in words is "two hundred eleven billion, eight hundred twenty-one million, one hundred ninety-nine thousand, five hundred thirty-six".