3121210000 has 50 divisors (see below), whose sum is σ = 7556785742. Its totient is φ = 1248480000.

The previous prime is 3121209991. The next prime is 3121210019. The reversal of 3121210000 is 121213.

It can be written as a sum of positive squares in 5 ways, for example, as 470195856 + 2651014144 = 21684^2 + 51488^2 .

It is a tau number, because it is divible by the number of its divisors (50).

It is a Harshad number since it is a multiple of its sum of digits (10).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 146061 + ... + 166060.

Almost surely, 2^3121210000 is an apocalyptic number.

It is an amenable number.

3121210000 is an abundant number, since it is smaller than the sum of its proper divisors (4435575742).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3121210000 is an equidigital number, since it uses as much as digits as its factorization.

3121210000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312149 (or 312128 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 3121210000 is about 55867.7903626052. The cubic root of 3121210000 is about 1461.4175885548.

Adding to 3121210000 its reverse (121213), we get a palindrome (3121331213).

The spelling of 3121210000 in words is "three billion, one hundred twenty-one million, two hundred ten thousand".