2129021039 has 4 divisors (see below), whose sum is σ = 2145273240. Its totient is φ = 2112768840.

The previous prime is 2129021023. The next prime is 2129021071. The reversal of 2129021039 is 9301209212.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2129021039 - 2⁴ = 2129021023 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2129021009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8125904 + ... + 8126165.

It is an arithmetic number, because the mean of its divisors is an integer number (536318310).

Almost surely, 2^2129021039 is an apocalyptic number.

2129021039 is a deficient number, since it is larger than the sum of its proper divisors (16252201).

2129021039 is a wasteful number, since it uses less digits than its factorization.

2129021039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16252200.

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 2129021039 is about 46141.3159651954. The cubic root of 2129021039 is about 1286.4512038723.

The spelling of 2129021039 in words is "two billion, one hundred twenty-nine million, twenty-one thousand, thirty-nine".