4202222121 has 12 divisors (see below), whose sum is σ = 6078235072. Its totient is φ = 2797623576.

The previous prime is 4202222083. The next prime is 4202222149. The reversal of 4202222121 is 1212222024.

4202222121 is a `hidden beast` number, since 420 + 2 + 2 + 221 + 21 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-4202222121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4202222094 and 4202222103.

It is not an unprimeable number, because it can be changed into a prime (4202222161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 314581 + ... + 327666.

Almost surely, 2^4202222121 is an apocalyptic number.

It is an amenable number.

4202222121 is a deficient number, since it is larger than the sum of its proper divisors (1876012951).

4202222121 is a wasteful number, since it uses less digits than its factorization.

4202222121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 642980 (or 642977 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 4202222121 is about 64824.5487527680. The cubic root of 4202222121 is about 1613.7131382130.

Adding to 4202222121 its reverse (1212222024), we get a palindrome (5414444145).

The spelling of 4202222121 in words is "four billion, two hundred two million, two hundred twenty-two thousand, one hundred twenty-one".