3891212121983 has 8 divisors (see below), whose sum is σ = 3897718978368. Its totient is φ = 3884705784864.

The previous prime is 3891212121931. The next prime is 3891212121989.

3891212121983 is nontrivially palindromic in base 10.

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 3891212121983 - 2³⁶ = 3822492645247 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3891212121989) 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, 16684685 + ... + 16916297.

It is an arithmetic number, because the mean of its divisors is an integer number (487214872296).

Almost surely, 2^{3891212121983} is an apocalyptic number.

3891212121983 is a deficient number, since it is larger than the sum of its proper divisors (6506856385).

3891212121983 is a wasteful number, since it uses less digits than its factorization.

3891212121983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259633.

The product of its digits is 373248, while the sum is 50.

The spelling of 3891212121983 in words is "three trillion, eight hundred ninety-one billion, two hundred twelve million, one hundred twenty-one thousand, nine hundred eighty-three".