2110222021 has 4 divisors (see below), whose sum is σ = 2110639852. Its totient is φ = 2109804192.

The previous prime is 2110222001. The next prime is 2110222031. The reversal of 2110222021 is 1202220112.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 550840900 + 1559381121 = 23470^2 + 39489^2 .

It is a cyclic number.

It is not a de Polignac number, because 2110222021 - 2¹⁵ = 2110189253 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2110221992 and 2110222010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2110222001) 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, 201246 + ... + 211471.

It is an arithmetic number, because the mean of its divisors is an integer number (527659963).

Almost surely, 2^2110222021 is an apocalyptic number.

It is an amenable number.

2110222021 is a deficient number, since it is larger than the sum of its proper divisors (417831).

2110222021 is an equidigital number, since it uses as much as digits as its factorization.

2110222021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 417830.

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

The square root of 2110222021 is about 45937.1529483489. The cubic root of 2110222021 is about 1282.6535975439.

Adding to 2110222021 its reverse (1202220112), we get a palindrome (3312442133).

The spelling of 2110222021 in words is "two billion, one hundred ten million, two hundred twenty-two thousand, twenty-one".