2102002129 has 4 divisors (see below), whose sum is σ = 2212633840. Its totient is φ = 1991370420.

The previous prime is 2102002109. The next prime is 2102002139. The reversal of 2102002129 is 9212002012.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2102002129 - 2¹⁹ = 2101477841 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19), and also a Moran number because the ratio is a prime number: 110631691 = 2102002129 / (2 + 1 + 0 + 2 + 0 + 0 + 2 + 1 + 2 + 9).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2102002109) 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, 55315827 + ... + 55315864.

It is an arithmetic number, because the mean of its divisors is an integer number (553158460).

Almost surely, 2^2102002129 is an apocalyptic number.

It is an amenable number.

2102002129 is a deficient number, since it is larger than the sum of its proper divisors (110631711).

2102002129 is a wasteful number, since it uses less digits than its factorization.

2102002129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110631710.

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 2102002129 is about 45847.5967636255. The cubic root of 2102002129 is about 1280.9860015456.

The spelling of 2102002129 in words is "two billion, one hundred two million, two thousand, one hundred twenty-nine".