3121220224 has 32 divisors (see below), whose sum is σ = 6230845440. Its totient is φ = 1557400320.

The previous prime is 3121220159. The next prime is 3121220251. The reversal of 3121220224 is 4220221213.

It is a tau number, because it is divible by the number of its divisors (32).

It is a super-2 number, since 2×3121220224² = 19484031373413220352, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38017 + ... + 87679.

It is an arithmetic number, because the mean of its divisors is an integer number (194713920).

Almost surely, 2^3121220224 is an apocalyptic number.

It is an amenable number.

3121220224 is a deficient number, since it is larger than the sum of its proper divisors (3109625216).

3121220224 is an equidigital number, since it uses as much as digits as its factorization.

3121220224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50168 (or 50156 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 3121220224 is about 55867.8818642697. The cubic root of 3121220224 is about 1461.4191842519.

Adding to 3121220224 its reverse (4220221213), we get a palindrome (7341441437).

The spelling of 3121220224 in words is "three billion, one hundred twenty-one million, two hundred twenty thousand, two hundred twenty-four".