3331031021 has 4 divisors (see below), whose sum is σ = 3363371232. Its totient is φ = 3298690812.

The previous prime is 3331031009. The next prime is 3331031071. The reversal of 3331031021 is 1201301333.

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: 1201301333 = 5297 ⋅226789.

It is a cyclic number.

It is not a de Polignac number, because 3331031021 - 2¹⁴ = 3331014637 is a prime.

It is a super-2 number, since 2×3331031021² = 22191535325728604882, which 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 (3331031071) 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, 16169951 + ... + 16170156.

It is an arithmetic number, because the mean of its divisors is an integer number (840842808).

Almost surely, 2^3331031021 is an apocalyptic number.

It is an amenable number.

3331031021 is a deficient number, since it is larger than the sum of its proper divisors (32340211).

3331031021 is a wasteful number, since it uses less digits than its factorization.

3331031021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32340210.

The product of its (nonzero) digits is 162, while the sum is 17.

The square root of 3331031021 is about 57715.0848652239. The cubic root of 3331031021 is about 1493.4575831936.

Adding to 3331031021 its reverse (1201301333), we get a palindrome (4532332354).

The spelling of 3331031021 in words is "three billion, three hundred thirty-one million, thirty-one thousand, twenty-one".