3212220415021 has 4 divisors (see below), whose sum is σ = 3212227638844. Its totient is φ = 3212213191200.

The previous prime is 3212220414983. The next prime is 3212220415051. The reversal of 3212220415021 is 1205140222123.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 142120706121 + 3070099708900 = 376989^2 + 1752170^2 .

It is a cyclic number.

It is not a de Polignac number, because 3212220415021 - 2⁹ = 3212220414509 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 (3212220415051) 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, 2897850 + ... + 3849931.

It is an arithmetic number, because the mean of its divisors is an integer number (803056909711).

Almost surely, 2^{3212220415021} is an apocalyptic number.

It is an amenable number.

3212220415021 is a deficient number, since it is larger than the sum of its proper divisors (7223823).

3212220415021 is an equidigital number, since it uses as much as digits as its factorization.

3212220415021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7223822.

The product of its (nonzero) digits is 1920, while the sum is 25.

Adding to 3212220415021 its reverse (1205140222123), we get a palindrome (4417360637144).

The spelling of 3212220415021 in words is "three trillion, two hundred twelve billion, two hundred twenty million, four hundred fifteen thousand, twenty-one".