2123201138 has 8 divisors (see below), whose sum is σ = 3185816832. Its totient is φ = 1061262196.

The previous prime is 2123201137. The next prime is 2123201141. The reversal of 2123201138 is 8311023212.

It is a happy number.

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

It is not an unprimeable number, because it can be changed into a prime (2123201137) 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, 161270 + ... + 173937.

It is an arithmetic number, because the mean of its divisors is an integer number (398227104).

Almost surely, 2^2123201138 is an apocalyptic number.

2123201138 is a deficient number, since it is larger than the sum of its proper divisors (1062615694).

2123201138 is a wasteful number, since it uses less digits than its factorization.

2123201138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 338376.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 2123201138 is about 46078.2067576419. The cubic root of 2123201138 is about 1285.2779179548.

The spelling of 2123201138 in words is "two billion, one hundred twenty-three million, two hundred one thousand, one hundred thirty-eight".