123021203020 has 24 divisors (see below), whose sum is σ = 258678769104. Its totient is φ = 49144815936.

The previous prime is 123021202979. The next prime is 123021203029. The reversal of 123021203020 is 20302120321.

It is a junction number, because it is equal to n+sod(n) for n = 123021202985 and 123021203003.

It is not an unprimeable number, because it can be changed into a prime (123021203029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3963234 + ... + 3994153.

It is an arithmetic number, because the mean of its divisors is an integer number (10778282046).

Almost surely, 2^123021203020 is an apocalyptic number.

123021203020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123021203020 is an abundant number, since it is smaller than the sum of its proper divisors (135657566084).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

123021203020 is a wasteful number, since it uses less digits than its factorization.

123021203020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7958169 (or 7958167 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 123021203020 its reverse (20302120321), we get a palindrome (143323323341).

It can be divided in two parts, 123021 and 203020, that added together give a square (326041 = 571²).

The spelling of 123021203020 in words is "one hundred twenty-three billion, twenty-one million, two hundred three thousand, twenty".