2220000122221 has 32 divisors (see below), whose sum is σ = 2565315264512. Its totient is φ = 1881834534720.

The previous prime is 2220000122213. The next prime is 2220000122233. The reversal of 2220000122221 is 1222210000222.

It is not a de Polignac number, because 2220000122221 - 2³ = 2220000122213 is a prime.

It is a super-2 number, since 2×2220000122221² (a number of 25 digits) contains 22 as substring.

2220000122221 is a modest number, since divided by 122221 gives 222 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 2220000122195 and 2220000122204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2220000128221) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 399493375 + ... + 399498931.

It is an arithmetic number, because the mean of its divisors is an integer number (80166102016).

Almost surely, 2^{2220000122221} is an apocalyptic number.

It is an amenable number.

2220000122221 is a deficient number, since it is larger than the sum of its proper divisors (345315142291).

2220000122221 is a wasteful number, since it uses less digits than its factorization.

2220000122221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7049.

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 2220000122221 its reverse (1222210000222), we get a palindrome (3442210122443).

It can be divided in two parts, 22200001 and 22221, that added together give a palindrome (22222222).

The spelling of 2220000122221 in words is "two trillion, two hundred twenty billion, one hundred twenty-two thousand, two hundred twenty-one".