211000021000 has 32 divisors (see below), whose sum is σ = 493740051480. Its totient is φ = 84400008000.

The previous prime is 211000020977. The next prime is 211000021039. The reversal of 211000021000 is 120000112.

It can be written as a sum of positive squares in 4 ways, for example, as 29791450404 + 181208570596 = 172602^2 + 425686^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 105499011 + ... + 105501010.

Almost surely, 2^211000021000 is an apocalyptic number.

211000021000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211000021000 is an abundant number, since it is smaller than the sum of its proper divisors (282740030480).

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

211000021000 is a wasteful number, since it uses less digits than its factorization.

211000021000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211000042 (or 211000028 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 7.

Adding to 211000021000 its reverse (120000112), we get a palindrome (211120021112).

The spelling of 211000021000 in words is "two hundred eleven billion, twenty-one thousand".