12121031002 has 4 divisors (see below), whose sum is σ = 18181546506. Its totient is φ = 6060515500.

The previous prime is 12121030973. The next prime is 12121031009. The reversal of 12121031002 is 20013012121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 20013012121 = 601 ⋅33299521.

It can be written as a sum of positive squares in only one way, i.e., 8996332801 + 3124698201 = 94849^2 + 55899^2 .

It is not an unprimeable number, because it can be changed into a prime (12121031009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3030257749 + ... + 3030257752.

Almost surely, 2^12121031002 is an apocalyptic number.

12121031002 is a deficient number, since it is larger than the sum of its proper divisors (6060515504).

12121031002 is an equidigital number, since it uses as much as digits as its factorization.

12121031002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6060515503.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 12121031002 its reverse (20013012121), we get a palindrome (32134043123).

The spelling of 12121031002 in words is "twelve billion, one hundred twenty-one million, thirty-one thousand, two".