3420981329971 has 4 divisors (see below), whose sum is σ = 3420985033944. Its totient is φ = 3420977626000.

The previous prime is 3420981329957. The next prime is 3420981330001. The reversal of 3420981329971 is 1799231890243.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 3420981329971 - 2³⁹ = 2871225516083 is a prime.

It is a super-2 number, since 2×3420981329971² (a number of 26 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3420981329951) 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, 784716 + ... + 2730886.

It is an arithmetic number, because the mean of its divisors is an integer number (855246258486).

Almost surely, 2^{3420981329971} is an apocalyptic number.

3420981329971 is a deficient number, since it is larger than the sum of its proper divisors (3703973).

3420981329971 is a wasteful number, since it uses less digits than its factorization.

3420981329971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3703972.

The product of its (nonzero) digits is 5878656, while the sum is 58.

The spelling of 3420981329971 in words is "three trillion, four hundred twenty billion, nine hundred eighty-one million, three hundred twenty-nine thousand, nine hundred seventy-one".