3121211023 has 4 divisors (see below), whose sum is σ = 3567098320. Its totient is φ = 2675323728.

The previous prime is 3121211017. The next prime is 3121211039. The reversal of 3121211023 is 3201121213.

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

It is not a de Polignac number, because 3121211023 - 2⁹ = 3121210511 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3121210988 and 3121211006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3121211053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 222943638 + ... + 222943651.

It is an arithmetic number, because the mean of its divisors is an integer number (891774580).

Almost surely, 2^3121211023 is an apocalyptic number.

3121211023 is a deficient number, since it is larger than the sum of its proper divisors (445887297).

3121211023 is an equidigital number, since it uses as much as digits as its factorization.

3121211023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 445887296.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 3121211023 is about 55867.7995181482. The cubic root of 3121211023 is about 1461.4177482183.

Adding to 3121211023 its reverse (3201121213), we get a palindrome (6322332236).

The spelling of 3121211023 in words is "three billion, one hundred twenty-one million, two hundred eleven thousand, twenty-three".