3121223100 has 72 divisors (see below), whose sum is σ = 9506058240. Its totient is φ = 788518080.

The previous prime is 3121223093. The next prime is 3121223101. The reversal of 3121223100 is 13221213.

It is a super-2 number, since 2×3121223100² = 19484067279947220000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 3121223100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3121223101) 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, 268092 + ... + 279491.

Almost surely, 2^3121223100 is an apocalyptic number.

3121223100 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3121223100 is an abundant number, since it is smaller than the sum of its proper divisors (6384835140).

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

3121223100 is a wasteful number, since it uses less digits than its factorization.

3121223100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 547619 (or 547612 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 3121223100 is about 55867.9076035607. The cubic root of 3121223100 is about 1461.4196331191.

Adding to 3121223100 its reverse (13221213), we get a palindrome (3134444313).

The spelling of 3121223100 in words is "three billion, one hundred twenty-one million, two hundred twenty-three thousand, one hundred".