2201122021 has 4 divisors (see below), whose sum is σ = 2515568032. Its totient is φ = 1886676012.

The previous prime is 2201121973. The next prime is 2201122037. The reversal of 2201122021 is 1202211022.

It is a happy number.

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 not a de Polignac number, because 2201122021 - 2⁷ = 2201121893 is a prime.

It is a super-2 number, since 2×2201122021² = 9689876302662248882, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2201121992 and 2201122010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2201122421) 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, 157222995 + ... + 157223008.

It is an arithmetic number, because the mean of its divisors is an integer number (628892008).

Almost surely, 2^2201122021 is an apocalyptic number.

It is an amenable number.

2201122021 is a deficient number, since it is larger than the sum of its proper divisors (314446011).

2201122021 is an equidigital number, since it uses as much as digits as its factorization.

2201122021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 314446010.

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

The square root of 2201122021 is about 46916.1168576429. The cubic root of 2201122021 is about 1300.8125139577.

Adding to 2201122021 its reverse (1202211022), we get a palindrome (3403333043).

The spelling of 2201122021 in words is "two billion, two hundred one million, one hundred twenty-two thousand, twenty-one".