2210212021 has 4 divisors (see below), whose sum is σ = 2240488972. Its totient is φ = 2179935072.

The previous prime is 2210211967. The next prime is 2210212033. The reversal of 2210212021 is 1202120122.

It is a happy number.

2210212021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 1903576900 + 306635121 = 43630^2 + 17511^2 .

It is a cyclic number.

It is not a de Polignac number, because 2210212021 - 2⁷ = 2210211893 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2210211992 and 2210212010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2210212421) 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, 15138366 + ... + 15138511.

It is an arithmetic number, because the mean of its divisors is an integer number (560122243).

Almost surely, 2^2210212021 is an apocalyptic number.

It is an amenable number.

2210212021 is a deficient number, since it is larger than the sum of its proper divisors (30276951).

2210212021 is an equidigital number, since it uses as much as digits as its factorization.

2210212021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30276950.

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

The square root of 2210212021 is about 47012.8920722816. The cubic root of 2210212021 is about 1302.6007149720.

Adding to 2210212021 its reverse (1202120122), we get a palindrome (3412332143).

The spelling of 2210212021 in words is "two billion, two hundred ten million, two hundred twelve thousand, twenty-one".