123020211021 has 16 divisors (see below), whose sum is σ = 174387966336. Its totient is φ = 76967523776.

The previous prime is 123020210953. The next prime is 123020211049. The reversal of 123020211021 is 120112020321.

It is a cyclic number.

It is not a de Polignac number, because 123020211021 - 2¹³ = 123020202829 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123020211091) 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 15 ways as a sum of consecutive naturals, for example, 16816170 + ... + 16823483.

It is an arithmetic number, because the mean of its divisors is an integer number (10899247896).

Almost surely, 2^123020211021 is an apocalyptic number.

It is an amenable number.

123020211021 is a deficient number, since it is larger than the sum of its proper divisors (51367755315).

123020211021 is a wasteful number, since it uses less digits than its factorization.

123020211021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33639732.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 123020211021 its reverse (120112020321), we get a palindrome (243132231342).

The spelling of 123020211021 in words is "one hundred twenty-three billion, twenty million, two hundred eleven thousand, twenty-one".