3031201021 has 4 divisors (see below), whose sum is σ = 3101694112. Its totient is φ = 2960707932.

The previous prime is 3031200961. The next prime is 3031201037. The reversal of 3031201021 is 1201021303.

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.

It is a cyclic number.

It is not a de Polignac number, because 3031201021 - 2¹⁷ = 3031069949 is a prime.

It is a super-2 number, since 2×3031201021² = 18376359259422884882, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3031200992 and 3031201010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3031208021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35246481 + ... + 35246566.

It is an arithmetic number, because the mean of its divisors is an integer number (775423528).

Almost surely, 2^3031201021 is an apocalyptic number.

It is an amenable number.

3031201021 is a deficient number, since it is larger than the sum of its proper divisors (70493091).

3031201021 is an equidigital number, since it uses as much as digits as its factorization.

3031201021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70493090.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 3031201021 is about 55056.3440577015. The cubic root of 3031201021 is about 1447.2322981285.

Adding to 3031201021 its reverse (1201021303), we get a palindrome (4232222324).

It can be divided in two parts, 303 and 1201021, that multiplied together give a palindrome (363909363).

The spelling of 3031201021 in words is "three billion, thirty-one million, two hundred one thousand, twenty-one".