4051122221 has 8 divisors (see below), whose sum is σ = 4306562400. Its totient is φ = 3799904400.

The previous prime is 4051122211. The next prime is 4051122223. The reversal of 4051122221 is 1222211504.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 4051122221 - 2²⁶ = 3984013357 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4051122193 and 4051122202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4051122223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1053611 + ... + 1057448.

It is an arithmetic number, because the mean of its divisors is an integer number (538320300).

Almost surely, 2^4051122221 is an apocalyptic number.

It is an amenable number.

4051122221 is a deficient number, since it is larger than the sum of its proper divisors (255440179).

4051122221 is a wasteful number, since it uses less digits than its factorization.

4051122221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2111179.

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 4051122221 is about 63648.4266969734. The cubic root of 4051122221 is about 1594.1350670618.

Adding to 4051122221 its reverse (1222211504), we get a palindrome (5273333725).

The spelling of 4051122221 in words is "four billion, fifty-one million, one hundred twenty-two thousand, two hundred twenty-one".