211000021011 has 40 divisors (see below), whose sum is σ = 354201983520. Its totient is φ = 124200667008.

The previous prime is 211000020977. The next prime is 211000021039. The reversal of 211000021011 is 110120000112.

It is a happy number.

It is not a de Polignac number, because 211000021011 - 2⁶ = 211000020947 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 211000020984 and 211000021002.

It is not an unprimeable number, because it can be changed into a prime (211000021051) by changing a digit.

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 39 ways as a sum of consecutive naturals, for example, 4331866 + ... + 4380303.

It is an arithmetic number, because the mean of its divisors is an integer number (8855049588).

Almost surely, 2^211000021011 is an apocalyptic number.

211000021011 is a deficient number, since it is larger than the sum of its proper divisors (143201962509).

211000021011 is a wasteful number, since it uses less digits than its factorization.

211000021011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8712217 (or 8712208 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 211000021011 its reverse (110120000112), we get a palindrome (321120021123).

The spelling of 211000021011 in words is "two hundred eleven billion, twenty-one thousand, eleven".