3990212132221 has 8 divisors (see below), whose sum is σ = 4566674378240. Its totient is φ = 3415357871568.

The previous prime is 3990212132177. The next prime is 3990212132227. The reversal of 3990212132221 is 1222312120993.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3990212132221 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 (3990212132227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 401991021 + ... + 402000946.

It is an arithmetic number, because the mean of its divisors is an integer number (570834297280).

Almost surely, 2^{3990212132221} is an apocalyptic number.

It is an amenable number.

3990212132221 is a deficient number, since it is larger than the sum of its proper divisors (576462246019).

3990212132221 is an equidigital number, since it uses as much as digits as its factorization.

3990212132221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 803992683.

The product of its (nonzero) digits is 23328, while the sum is 37.

The spelling of 3990212132221 in words is "three trillion, nine hundred ninety billion, two hundred twelve million, one hundred thirty-two thousand, two hundred twenty-one".