2121641423 has 4 divisors (see below), whose sum is σ = 2314517928. Its totient is φ = 1928764920.

The previous prime is 2121641419. The next prime is 2121641447. The reversal of 2121641423 is 3241461212.

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 2121641423 - 2² = 2121641419 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2121641392 and 2121641401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121641723) 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, 96438236 + ... + 96438257.

It is an arithmetic number, because the mean of its divisors is an integer number (578629482).

Almost surely, 2^2121641423 is an apocalyptic number.

2121641423 is a deficient number, since it is larger than the sum of its proper divisors (192876505).

2121641423 is a wasteful number, since it uses less digits than its factorization.

2121641423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192876504.

The product of its digits is 2304, while the sum is 26.

The square root of 2121641423 is about 46061.2789987425. The cubic root of 2121641423 is about 1284.9631168286.

The spelling of 2121641423 in words is "two billion, one hundred twenty-one million, six hundred forty-one thousand, four hundred twenty-three".