3121000212 has 48 divisors (see below), whose sum is σ = 7957785024. Its totient is φ = 944160000.

The previous prime is 3121000193. The next prime is 3121000247. The reversal of 3121000212 is 2120001213.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 59662 + ... + 99002.

It is an arithmetic number, because the mean of its divisors is an integer number (165787188).

Almost surely, 2^3121000212 is an apocalyptic number.

It is an amenable number.

3121000212 is an abundant number, since it is smaller than the sum of its proper divisors (4836784812).

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

3121000212 is a wasteful number, since it uses less digits than its factorization.

3121000212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39960 (or 39958 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 3121000212 is about 55865.9127912540. The cubic root of 3121000212 is about 1461.3848454047.

Adding to 3121000212 its reverse (2120001213), we get a palindrome (5241001425).

The spelling of 3121000212 in words is "three billion, one hundred twenty-one million, two hundred twelve", and thus it is an aban number.