3331211231021 has 4 divisors (see below), whose sum is σ = 3332639099292. Its totient is φ = 3329783362752.

The previous prime is 3331211231009. The next prime is 3331211231057. The reversal of 3331211231021 is 1201321121333.

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 754142875396 + 2577068355625 = 868414^2 + 1605325^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3331211231021 is a prime.

It is a super-2 number, since 2×3331211231021² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3331211231921) 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, 713930636 + ... + 713935301.

It is an arithmetic number, because the mean of its divisors is an integer number (833159774823).

Almost surely, 2^{3331211231021} is an apocalyptic number.

It is an amenable number.

3331211231021 is a deficient number, since it is larger than the sum of its proper divisors (1427868271).

3331211231021 is a wasteful number, since it uses less digits than its factorization.

3331211231021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1427868270.

The product of its (nonzero) digits is 648, while the sum is 23.

Adding to 3331211231021 its reverse (1201321121333), we get a palindrome (4532532352354).

The spelling of 3331211231021 in words is "three trillion, three hundred thirty-one billion, two hundred eleven million, two hundred thirty-one thousand, twenty-one".