2220022021 has 8 divisors (see below), whose sum is σ = 2552734784. Its totient is φ = 1891200960.

The previous prime is 2220022009. The next prime is 2220022033. The reversal of 2220022021 is 1202200222.

It is an interprime number because it is at equal distance from previous prime (2220022009) and next prime (2220022033).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2220022021 - 2¹¹ = 2220019973 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2220021992 and 2220022010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2220022001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 971700 + ... + 973981.

It is an arithmetic number, because the mean of its divisors is an integer number (319091848).

Almost surely, 2^2220022021 is an apocalyptic number.

It is an amenable number.

2220022021 is a deficient number, since it is larger than the sum of its proper divisors (332712763).

2220022021 is a wasteful number, since it uses less digits than its factorization.

2220022021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1945851.

The product of its (nonzero) digits is 64, while the sum is 13.

The square root of 2220022021 is about 47117.1096418276. The cubic root of 2220022021 is about 1304.5250633472.

Adding to 2220022021 its reverse (1202200222), we get a palindrome (3422222243).

The spelling of 2220022021 in words is "two billion, two hundred twenty million, twenty-two thousand, twenty-one".