2122002221 has 4 divisors (see below), whose sum is σ = 2124461952. Its totient is φ = 2119542492.

The previous prime is 2122002199. The next prime is 2122002263. The reversal of 2122002221 is 1222002212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2122002221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2122002196 and 2122002205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2122004221) 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, 1228571 + ... + 1230296.

It is an arithmetic number, because the mean of its divisors is an integer number (531115488).

Almost surely, 2^2122002221 is an apocalyptic number.

It is an amenable number.

2122002221 is a deficient number, since it is larger than the sum of its proper divisors (2459731).

2122002221 is an equidigital number, since it uses as much as digits as its factorization.

2122002221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2459730.

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 2122002221 is about 46065.1953322679. The cubic root of 2122002221 is about 1285.0359512922.

Adding to 2122002221 its reverse (1222002212), we get a palindrome (3344004433).

Subtracting from 2122002221 its reverse (1222002212), we obtain a palindrome (900000009).

The spelling of 2122002221 in words is "two billion, one hundred twenty-two million, two thousand, two hundred twenty-one".