3122212221 has 24 divisors (see below), whose sum is σ = 4771372320. Its totient is φ = 1961892576.

The previous prime is 3122212207. The next prime is 3122212273. The reversal of 3122212221 is 1222122213.

It is not a de Polignac number, because 3122212221 - 2⁵ = 3122212189 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3122212194 and 3122212203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3122212321) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12655 + ... + 80028.

It is an arithmetic number, because the mean of its divisors is an integer number (198807180).

Almost surely, 2^3122212221 is an apocalyptic number.

It is an amenable number.

3122212221 is a deficient number, since it is larger than the sum of its proper divisors (1649160099).

3122212221 is a wasteful number, since it uses less digits than its factorization.

3122212221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92905 (or 92902 counting only the distinct ones).

The product of its digits is 192, while the sum is 18.

The square root of 3122212221 is about 55876.7592206277. The cubic root of 3122212221 is about 1461.5739922847.

Adding to 3122212221 its reverse (1222122213), we get a palindrome (4344334434).

It can be divided in two parts, 3 and 122212221, that multiplied together give a palindrome (366636663).

The spelling of 3122212221 in words is "three billion, one hundred twenty-two million, two hundred twelve thousand, two hundred twenty-one".