3121000129 has 4 divisors (see below), whose sum is σ = 3361077076. Its totient is φ = 2880923184.

The previous prime is 3121000117. The next prime is 3121000153. The reversal of 3121000129 is 9210001213.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9210001213 = 7 ⋅1315714459.

It can be written as a sum of positive squares in 2 ways, for example, as 1226400400 + 1894599729 = 35020^2 + 43527^2 .

It is a cyclic number.

It is not a de Polignac number, because 3121000129 - 2¹¹ = 3120998081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3121000159) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 120038454 + ... + 120038479.

It is an arithmetic number, because the mean of its divisors is an integer number (840269269).

Almost surely, 2^3121000129 is an apocalyptic number.

It is an amenable number.

3121000129 is a deficient number, since it is larger than the sum of its proper divisors (240076947).

3121000129 is a wasteful number, since it uses less digits than its factorization.

3121000129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240076946.

The product of its (nonzero) digits is 108, while the sum is 19.

The square root of 3121000129 is about 55865.9120484039. The cubic root of 3121000129 is about 1461.3848324500.

The spelling of 3121000129 in words is "three billion, one hundred twenty-one million, one hundred twenty-nine", and thus it is an aban number.