4121953921 has 8 divisors (see below), whose sum is σ = 4169836800. Its totient is φ = 4074106080.

The previous prime is 4121953897. The next prime is 4121953933. The reversal of 4121953921 is 1293591214.

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

It is a cyclic number.

It is not a de Polignac number, because 4121953921 - 2³¹ = 1974470273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4121953951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 284040 + ... + 298198.

It is an arithmetic number, because the mean of its divisors is an integer number (521229600).

Almost surely, 2^4121953921 is an apocalyptic number.

It is an amenable number.

4121953921 is a deficient number, since it is larger than the sum of its proper divisors (47882879).

4121953921 is a wasteful number, since it uses less digits than its factorization.

4121953921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17519.

The product of its digits is 19440, while the sum is 37.

The square root of 4121953921 is about 64202.4448210502. Note that the first 3 decimals coincide. The cubic root of 4121953921 is about 1603.3723040317.

The spelling of 4121953921 in words is "four billion, one hundred twenty-one million, nine hundred fifty-three thousand, nine hundred twenty-one".