2011012221 has 16 divisors (see below), whose sum is σ = 2775015360. Its totient is φ = 1293882240.

The previous prime is 2011012207. The next prime is 2011012247. The reversal of 2011012221 is 1222101102.

It is not a de Polignac number, because 2011012221 - 2⁵ = 2011012189 is a prime.

It is a super-2 number, since 2×2011012221² = 8088340306022705682, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2011012197 and 2011012206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2011012021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 307441 + ... + 313913.

It is an arithmetic number, because the mean of its divisors is an integer number (173438460).

Almost surely, 2^2011012221 is an apocalyptic number.

It is an amenable number.

2011012221 is a deficient number, since it is larger than the sum of its proper divisors (764003139).

2011012221 is a wasteful number, since it uses less digits than its factorization.

2011012221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10076.

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 2011012221 is about 44844.3109100809. The cubic root of 2011012221 is about 1262.2292401879.

Adding to 2011012221 its reverse (1222101102), we get a palindrome (3233113323).

The spelling of 2011012221 in words is "two billion, eleven million, twelve thousand, two hundred twenty-one".