2220222121 has 6 divisors (see below), whose sum is σ = 2404146030. Its totient is φ = 2049435648.

The previous prime is 2220222089. The next prime is 2220222127. The reversal of 2220222121 is 1212220222.

It can be written as a sum of positive squares in 3 ways, for example, as 109830400 + 2110391721 = 10480^2 + 45939^2 .

It is not a de Polignac number, because 2220222121 - 2⁵ = 2220222089 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2220222095 and 2220222104.

It is not an unprimeable number, because it can be changed into a prime (2220222127) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6568536 + ... + 6568873.

It is an arithmetic number, because the mean of its divisors is an integer number (400691005).

Almost surely, 2^2220222121 is an apocalyptic number.

It is an amenable number.

2220222121 is a deficient number, since it is larger than the sum of its proper divisors (183923909).

2220222121 is a wasteful number, since it uses less digits than its factorization.

2220222121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13137435 (or 13137422 counting only the distinct ones).

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

The square root of 2220222121 is about 47119.2330264405. The cubic root of 2220222121 is about 1304.5642562952.

Adding to 2220222121 its reverse (1212220222), we get a palindrome (3432442343).

It can be divided in two parts, 2220222 and 121, that multiplied together give a palindrome (268646862).

The spelling of 2220222121 in words is "two billion, two hundred twenty million, two hundred twenty-two thousand, one hundred twenty-one".