3912286021 has 4 divisors (see below), whose sum is σ = 4471184032. Its totient is φ = 3353388012.

The previous prime is 3912286003. The next prime is 3912286031. The reversal of 3912286021 is 1206822193.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1206822193 = 1279 ⋅943567.

It is a cyclic number.

It is not a de Polignac number, because 3912286021 - 2⁵ = 3912285989 is a prime.

It is a super-2 number, since 2×3912286021² = 30611963820224024882, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3912286031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 279448995 + ... + 279449008.

It is an arithmetic number, because the mean of its divisors is an integer number (1117796008).

Almost surely, 2^3912286021 is an apocalyptic number.

It is an amenable number.

3912286021 is a deficient number, since it is larger than the sum of its proper divisors (558898011).

3912286021 is an equidigital number, since it uses as much as digits as its factorization.

3912286021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 558898010.

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 3912286021 is about 62548.2695284210. The cubic root of 3912286021 is about 1575.7120852950.

The spelling of 3912286021 in words is "three billion, nine hundred twelve million, two hundred eighty-six thousand, twenty-one".