4125191221 has 8 divisors (see below), whose sum is σ = 4168854144. Its totient is φ = 4081654080.

The previous prime is 4125191183. The next prime is 4125191263. The reversal of 4125191221 is 1221915214.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4125191221 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 4125191221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4125191281) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35236 + ... + 97426.

It is an arithmetic number, because the mean of its divisors is an integer number (521106768).

Almost surely, 2^4125191221 is an apocalyptic number.

It is an amenable number.

4125191221 is a deficient number, since it is larger than the sum of its proper divisors (43662923).

4125191221 is a wasteful number, since it uses less digits than its factorization.

4125191221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62891.

The product of its digits is 1440, while the sum is 28.

The square root of 4125191221 is about 64227.6515295398. The cubic root of 4125191221 is about 1603.7919463492.

The spelling of 4125191221 in words is "four billion, one hundred twenty-five million, one hundred ninety-one thousand, two hundred twenty-one".