3921096942181 has 4 divisors (see below), whose sum is σ = 4091579417952. Its totient is φ = 3750614466412.

The previous prime is 3921096942121. The next prime is 3921096942251. The reversal of 3921096942181 is 1812496901293.

It is a happy number.

3921096942181 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 3921096942181 - 2¹³ = 3921096933989 is a prime.

It is a super-2 number, since 2×3921096942181² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3921096942121) 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, 85241237851 + ... + 85241237896.

It is an arithmetic number, because the mean of its divisors is an integer number (1022894854488).

Almost surely, 2^{3921096942181} is an apocalyptic number.

It is an amenable number.

3921096942181 is a deficient number, since it is larger than the sum of its proper divisors (170482475771).

3921096942181 is a wasteful number, since it uses less digits than its factorization.

3921096942181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170482475770.

The product of its (nonzero) digits is 1679616, while the sum is 55.

The spelling of 3921096942181 in words is "three trillion, nine hundred twenty-one billion, ninety-six million, nine hundred forty-two thousand, one hundred eighty-one".