3121001002 has 12 divisors (see below), whose sum is σ = 5445828450. Its totient is φ = 1337571816.

The previous prime is 3121000991. The next prime is 3121001021. The reversal of 3121001002 is 2001001213.

It can be written as a sum of positive squares in only one way, i.e., 2847396321 + 273604681 = 53361^2 + 16541^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 3121001002.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 15923377 + ... + 15923572.

Almost surely, 2^3121001002 is an apocalyptic number.

3121001002 is a deficient number, since it is larger than the sum of its proper divisors (2324827448).

3121001002 is a wasteful number, since it uses less digits than its factorization.

3121001002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31846965 (or 31846958 counting only the distinct ones).

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

The square root of 3121001002 is about 55865.9198617547. The cubic root of 3121001002 is about 1461.3849687086.

Adding to 3121001002 its reverse (2001001213), we get a palindrome (5122002215).

The spelling of 3121001002 in words is "three billion, one hundred twenty-one million, one thousand, two".