210221012011 has 4 divisors (see below), whose sum is σ = 222586953912. Its totient is φ = 197855070112.

The previous prime is 210221011951. The next prime is 210221012063. The reversal of 210221012011 is 110210122012.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 210221012011 - 2⁷ = 210221011883 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 210221011982 and 210221012000.

It is not an unprimeable number, because it can be changed into a prime (210221012081) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6182970925 + ... + 6182970958.

It is an arithmetic number, because the mean of its divisors is an integer number (55646738478).

Almost surely, 2^210221012011 is an apocalyptic number.

210221012011 is a deficient number, since it is larger than the sum of its proper divisors (12365941901).

210221012011 is a wasteful number, since it uses less digits than its factorization.

210221012011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12365941900.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 210221012011 its reverse (110210122012), we get a palindrome (320431134023).

The spelling of 210221012011 in words is "two hundred ten billion, two hundred twenty-one million, twelve thousand, eleven".