221051011 has 8 divisors (see below), whose sum is σ = 226759680. Its totient is φ = 215384328.

The previous prime is 221051009. The next prime is 221051029. The reversal of 221051011 is 110150122.

221051011 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 221051011 - 2¹ = 221051009 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221050982 and 221051000.

It is not an unprimeable number, because it can be changed into a prime (221051041) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 310 + ... + 21028.

It is an arithmetic number, because the mean of its divisors is an integer number (28344960).

Almost surely, 2^221051011 is an apocalyptic number.

221051011 is a deficient number, since it is larger than the sum of its proper divisors (5708669).

221051011 is a wasteful number, since it uses less digits than its factorization.

221051011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20993.

The product of its (nonzero) digits is 20, while the sum is 13.

The square root of 221051011 is about 14867.7843339214. The cubic root of 221051011 is about 604.6408733121.

The spelling of 221051011 in words is "two hundred twenty-one million, fifty-one thousand, eleven".