211230313021 has 24 divisors (see below), whose sum is σ = 264099240384. Its totient is φ = 165404229120.

The previous prime is 211230312991. The next prime is 211230313057. The reversal of 211230313021 is 120313032112.

It is not a de Polignac number, because 211230313021 - 2⁷ = 211230312893 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 211230313021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211230314021) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 805635 + ... + 1035136.

It is an arithmetic number, because the mean of its divisors is an integer number (11004135016).

Almost surely, 2^211230313021 is an apocalyptic number.

It is an amenable number.

211230313021 is a deficient number, since it is larger than the sum of its proper divisors (52868927363).

211230313021 is a wasteful number, since it uses less digits than its factorization.

211230313021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1840901 (or 1840888 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 211230313021 its reverse (120313032112), we get a palindrome (331543345133).

The spelling of 211230313021 in words is "two hundred eleven billion, two hundred thirty million, three hundred thirteen thousand, twenty-one".