3218121901 has 8 divisors (see below), whose sum is σ = 3274165440. Its totient is φ = 3162128448.

The previous prime is 3218121869. The next prime is 3218121919. The reversal of 3218121901 is 1091218123.

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 3218121901 - 2⁵ = 3218121869 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 3218121901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3218121971) 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, 131320 + ... + 153886.

It is an arithmetic number, because the mean of its divisors is an integer number (409270680).

Almost surely, 2^3218121901 is an apocalyptic number.

It is an amenable number.

3218121901 is a deficient number, since it is larger than the sum of its proper divisors (56043539).

3218121901 is a wasteful number, since it uses less digits than its factorization.

3218121901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25043.

The product of its (nonzero) digits is 864, while the sum is 28.

The square root of 3218121901 is about 56728.4928497135. The cubic root of 3218121901 is about 1476.3891004255.

The spelling of 3218121901 in words is "three billion, two hundred eighteen million, one hundred twenty-one thousand, nine hundred one".