2232222021 has 6 divisors (see below), whose sum is σ = 3224320710. Its totient is φ = 1488148008.

The previous prime is 2232221993. The next prime is 2232222029. The reversal of 2232222021 is 1202222322.

It can be written as a sum of positive squares in only one way, i.e., 1882344996 + 349877025 = 43386^2 + 18705^2 .

It is not a de Polignac number, because 2232222021 - 2¹¹ = 2232219973 is a prime.

It is a super-3 number, since 3×2232222021³ (a number of 29 digits) contains 333 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2232221985 and 2232222003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2232222029) 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, 124012326 + ... + 124012343.

It is an arithmetic number, because the mean of its divisors is an integer number (537386785).

Almost surely, 2^2232222021 is an apocalyptic number.

It is an amenable number.

2232222021 is a deficient number, since it is larger than the sum of its proper divisors (992098689).

2232222021 is a wasteful number, since it uses less digits than its factorization.

2232222021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248024675 (or 248024672 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 2232222021 is about 47246.3969102407. The cubic root of 2232222021 is about 1306.9103461077.

Adding to 2232222021 its reverse (1202222322), we get a palindrome (3434444343).

The spelling of 2232222021 in words is "two billion, two hundred thirty-two million, two hundred twenty-two thousand, twenty-one".