2110021221 has 16 divisors (see below), whose sum is σ = 3507568128. Its totient is φ = 1096114800.

The previous prime is 2110021211. The next prime is 2110021241. The reversal of 2110021221 is 1221200112.

It is not a de Polignac number, because 2110021221 - 2⁷ = 2110021093 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2110021197 and 2110021206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2110021211) 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, 4566915 + ... + 4567376.

It is an arithmetic number, because the mean of its divisors is an integer number (219223008).

Almost surely, 2^2110021221 is an apocalyptic number.

2110021221 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2110021221 is a deficient number, since it is larger than the sum of its proper divisors (1397546907).

2110021221 is a wasteful number, since it uses less digits than its factorization.

2110021221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9134312.

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

The square root of 2110021221 is about 45934.9673016102. The cubic root of 2110021221 is about 1282.6129122495.

Adding to 2110021221 its reverse (1221200112), we get a palindrome (3331221333).

The spelling of 2110021221 in words is "two billion, one hundred ten million, twenty-one thousand, two hundred twenty-one".