211300030021 has 12 divisors (see below), whose sum is σ = 221028968160. Its totient is φ = 201982641080.

The previous prime is 211300029893. The next prime is 211300030037. The reversal of 211300030021 is 120030003112.

It is not a de Polignac number, because 211300030021 - 2⁷ = 211300029893 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211300029983 and 211300030010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211300030121) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 696606 + ... + 952816.

It is an arithmetic number, because the mean of its divisors is an integer number (18419080680).

Almost surely, 2^211300030021 is an apocalyptic number.

It is an amenable number.

211300030021 is a deficient number, since it is larger than the sum of its proper divisors (9728938139).

211300030021 is a wasteful number, since it uses less digits than its factorization.

211300030021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257816 (or 257793 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 13.

Adding to 211300030021 its reverse (120030003112), we get a palindrome (331330033133).

The spelling of 211300030021 in words is "two hundred eleven billion, three hundred million, thirty thousand, twenty-one".