3121220104 has 8 divisors (see below), whose sum is σ = 5852287710. Its totient is φ = 1560610048.

The previous prime is 3121220087. The next prime is 3121220107. The reversal of 3121220104 is 4010221213.

It can be written as a sum of positive squares in only one way, i.e., 3099148900 + 22071204 = 55670^2 + 4698^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×3121220104² = 19484029875227541632, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (3121220107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 195076249 + ... + 195076264.

Almost surely, 2^3121220104 is an apocalyptic number.

It is an amenable number.

3121220104 is a deficient number, since it is larger than the sum of its proper divisors (2731067606).

3121220104 is a wasteful number, since it uses less digits than its factorization.

3121220104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 390152519 (or 390152515 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 3121220104 is about 55867.8807903074. The cubic root of 3121220104 is about 1461.4191655231.

Adding to 3121220104 its reverse (4010221213), we get a palindrome (7131441317).

The spelling of 3121220104 in words is "three billion, one hundred twenty-one million, two hundred twenty thousand, one hundred four".