3121212221023 has 24 divisors (see below), whose sum is σ = 3403667142000. Its totient is φ = 2860765000704.

The previous prime is 3121212220963. The next prime is 3121212221027. The reversal of 3121212221023 is 3201222121213.

It is a de Polignac number, because none of the positive numbers 2^k-3121212221023 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3121212220985 and 3121212221003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3121212221027) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 76000911 + ... + 76041967.

It is an arithmetic number, because the mean of its divisors is an integer number (141819464250).

Almost surely, 2^{3121212221023} is an apocalyptic number.

3121212221023 is a deficient number, since it is larger than the sum of its proper divisors (282454920977).

3121212221023 is a wasteful number, since it uses less digits than its factorization.

3121212221023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44251 (or 44238 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 3121212221023 its reverse (3201222121213), we get a palindrome (6322434342236).

The spelling of 3121212221023 in words is "three trillion, one hundred twenty-one billion, two hundred twelve million, two hundred twenty-one thousand, twenty-three".