6123121634621 has 4 divisors (see below), whose sum is σ = 6126899009244. Its totient is φ = 6119344260000.

The previous prime is 6123121634491. The next prime is 6123121634627. The reversal of 6123121634621 is 1264361213216.

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

It can be written as a sum of positive squares in 2 ways, for example, as 3182620320100 + 2940501314521 = 1783990^2 + 1714789^2 .

It is a cyclic number.

It is not a de Polignac number, because 6123121634621 - 2⁴² = 1725075123517 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6123121634627) 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, 1888684880 + ... + 1888688121.

It is an arithmetic number, because the mean of its divisors is an integer number (1531724752311).

Almost surely, 2^{6123121634621} is an apocalyptic number.

It is an amenable number.

6123121634621 is a deficient number, since it is larger than the sum of its proper divisors (3777374623).

6123121634621 is a wasteful number, since it uses less digits than its factorization.

6123121634621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3777374622.

The product of its digits is 62208, while the sum is 38.

Adding to 6123121634621 its reverse (1264361213216), we get a palindrome (7387482847837).

The spelling of 6123121634621 in words is "six trillion, one hundred twenty-three billion, one hundred twenty-one million, six hundred thirty-four thousand, six hundred twenty-one".