2111242129 has 4 divisors (see below), whose sum is σ = 2111583600. Its totient is φ = 2110900660.

The previous prime is 2111242123. The next prime is 2111242139. The reversal of 2111242129 is 9212421112.

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 2111242129 - 2⁵ = 2111242097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2111242123) 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, 161287 + ... + 173884.

It is an arithmetic number, because the mean of its divisors is an integer number (527895900).

Almost surely, 2^2111242129 is an apocalyptic number.

It is an amenable number.

2111242129 is a deficient number, since it is larger than the sum of its proper divisors (341471).

2111242129 is an equidigital number, since it uses as much as digits as its factorization.

2111242129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 341470.

The product of its digits is 576, while the sum is 25.

The square root of 2111242129 is about 45948.2549070147. The cubic root of 2111242129 is about 1282.8602479026.

The spelling of 2111242129 in words is "two billion, one hundred eleven million, two hundred forty-two thousand, one hundred twenty-nine".