2226420021 has 16 divisors (see below), whose sum is σ = 3393548928. Its totient is φ = 1271899200.

The previous prime is 2226419999. The next prime is 2226420037. The reversal of 2226420021 is 1200246222.

It is not a de Polignac number, because 2226420021 - 2⁵ = 2226419989 is a prime.

It is a super-2 number, since 2×2226420021² = 9913892219819280882, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 2226420021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2226420061) 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, 80851 + ... + 104831.

It is an arithmetic number, because the mean of its divisors is an integer number (212096808).

Almost surely, 2^2226420021 is an apocalyptic number.

2226420021 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2226420021 is a deficient number, since it is larger than the sum of its proper divisors (1167128907).

2226420021 is a wasteful number, since it uses less digits than its factorization.

2226420021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28412.

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 2226420021 is about 47184.9554519234. The cubic root of 2226420021 is about 1305.7770548677. Note that the first 3 decimals are identical.

Adding to 2226420021 its reverse (1200246222), we get a palindrome (3426666243).

It can be divided in two parts, 22264 and 20021, that multiplied together give a palindrome (445747544).

The spelling of 2226420021 in words is "two billion, two hundred twenty-six million, four hundred twenty thousand, twenty-one".