1000012129 has 4 divisors (see below), whose sum is σ = 1000130560. Its totient is φ = 999893700.

The previous prime is 1000012121. The next prime is 1000012157. The reversal of 1000012129 is 9212100001.

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 1000012129 - 2³ = 1000012121 is a prime.

It is a super-2 number, since 2×1000012129² = 2000048516294225282, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1000012121) 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, 45489 + ... + 63790.

It is an arithmetic number, because the mean of its divisors is an integer number (250032640).

Almost surely, 2^1000012129 is an apocalyptic number.

It is an amenable number.

1000012129 is a deficient number, since it is larger than the sum of its proper divisors (118431).

1000012129 is an equidigital number, since it uses as much as digits as its factorization.

1000012129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118430.

The product of its (nonzero) digits is 36, while the sum is 16.

The square root of 1000012129 is about 31622.9683774310. The cubic root of 1000012129 is about 1000.0040429837.

The spelling of 1000012129 in words is "one billion, twelve thousand, one hundred twenty-nine".