2011022221 has 8 divisors (see below), whose sum is σ = 2175983264. Its totient is φ = 1847527920.

The previous prime is 2011022203. The next prime is 2011022239. The reversal of 2011022221 is 1222201102.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (2011022203) and next prime (2011022239).

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 2011022221 - 2¹⁹ = 2010497933 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2011022281) 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, 363831 + ... + 369316.

It is an arithmetic number, because the mean of its divisors is an integer number (271997908).

Almost surely, 2^2011022221 is an apocalyptic number.

It is an amenable number.

2011022221 is a deficient number, since it is larger than the sum of its proper divisors (164961043).

2011022221 is a wasteful number, since it uses less digits than its factorization.

2011022221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 733371.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 2011022221 is about 44844.4224068055. The cubic root of 2011022221 is about 1262.2313323800.

Adding to 2011022221 its reverse (1222201102), we get a palindrome (3233223323).

The spelling of 2011022221 in words is "two billion, eleven million, twenty-two thousand, two hundred twenty-one".