3950217121 has 4 divisors (see below), whose sum is σ = 4182582852. Its totient is φ = 3717851392.

The previous prime is 3950217113. The next prime is 3950217127. The reversal of 3950217121 is 1217120593.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1727566096 + 2222651025 = 41564^2 + 47145^2 .

It is a cyclic number.

It is not a de Polignac number, because 3950217121 - 2³ = 3950217113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3950217127) 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, 116182840 + ... + 116182873.

It is an arithmetic number, because the mean of its divisors is an integer number (1045645713).

Almost surely, 2^3950217121 is an apocalyptic number.

It is an amenable number.

3950217121 is a deficient number, since it is larger than the sum of its proper divisors (232365731).

3950217121 is a wasteful number, since it uses less digits than its factorization.

3950217121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 232365730.

The product of its (nonzero) digits is 3780, while the sum is 31.

The square root of 3950217121 is about 62850.7527480777. The cubic root of 3950217121 is about 1580.7880917255.

The spelling of 3950217121 in words is "three billion, nine hundred fifty million, two hundred seventeen thousand, one hundred twenty-one".