3121020010123 has 4 divisors (see below), whose sum is σ = 3124985728840. Its totient is φ = 3117054291408.

The previous prime is 3121020010099. The next prime is 3121020010151. The reversal of 3121020010123 is 3210100201213.

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

It is a cyclic number.

It is not a de Polignac number, because 3121020010123 - 2²⁹ = 3120483139211 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3121020010097 and 3121020010106.

It is not an unprimeable number, because it can be changed into a prime (3121020010723) 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, 1982858178 + ... + 1982859751.

It is an arithmetic number, because the mean of its divisors is an integer number (781246432210).

Almost surely, 2^{3121020010123} is an apocalyptic number.

3121020010123 is a deficient number, since it is larger than the sum of its proper divisors (3965718717).

3121020010123 is an equidigital number, since it uses as much as digits as its factorization.

3121020010123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3965718716.

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

Adding to 3121020010123 its reverse (3210100201213), we get a palindrome (6331120211336).

The spelling of 3121020010123 in words is "three trillion, one hundred twenty-one billion, twenty million, ten thousand, one hundred twenty-three".