2212321021 has 16 divisors (see below), whose sum is σ = 2265677568. Its totient is φ = 2159718400.

The previous prime is 2212321019. The next prime is 2212321043. The reversal of 2212321021 is 1201232122.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 2212321021 - 2¹ = 2212321019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2212320986 and 2212321004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2212331021) 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, 4798731 + ... + 4799191.

It is an arithmetic number, because the mean of its divisors is an integer number (141604848).

Almost surely, 2^2212321021 is an apocalyptic number.

It is an amenable number.

2212321021 is a deficient number, since it is larger than the sum of its proper divisors (53356547).

2212321021 is a wasteful number, since it uses less digits than its factorization.

2212321021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1052.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 2212321021 is about 47035.3167417846. The cubic root of 2212321021 is about 1303.0149002100.

Adding to 2212321021 its reverse (1201232122), we get a palindrome (3413553143).

The spelling of 2212321021 in words is "two billion, two hundred twelve million, three hundred twenty-one thousand, twenty-one".