2138121934 has 8 divisors (see below), whose sum is σ = 3453889320. Its totient is φ = 986825496.

The previous prime is 2138121911. The next prime is 2138121941. The reversal of 2138121934 is 4391218312.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 2138121934.

It is a congruent number.

It is an unprimeable number.

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, 41117704 + ... + 41117755.

It is an arithmetic number, because the mean of its divisors is an integer number (431736165).

Almost surely, 2^2138121934 is an apocalyptic number.

2138121934 is a deficient number, since it is larger than the sum of its proper divisors (1315767386).

2138121934 is a wasteful number, since it uses less digits than its factorization.

2138121934 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82235474.

The product of its digits is 10368, while the sum is 34.

The square root of 2138121934 is about 46239.8306009008. The cubic root of 2138121934 is about 1288.2816561712.

The spelling of 2138121934 in words is "two billion, one hundred thirty-eight million, one hundred twenty-one thousand, nine hundred thirty-four".