123212020 has 12 divisors (see below), whose sum is σ = 258745284. Its totient is φ = 49284800.

The previous prime is 123211997. The next prime is 123212027. The reversal of 123212020 is 20212321.

It can be written as a sum of positive squares in 2 ways, for example, as 94439524 + 28772496 = 9718^2 + 5364^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123212027) 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, 3080281 + ... + 3080320.

It is an arithmetic number, because the mean of its divisors is an integer number (21562107).

Almost surely, 2^123212020 is an apocalyptic number.

123212020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123212020 is an abundant number, since it is smaller than the sum of its proper divisors (135533264).

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

123212020 is a wasteful number, since it uses less digits than its factorization.

123212020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6160610 (or 6160608 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 123212020 is about 11100.0909906180. The cubic root of 123212020 is about 497.6045688125.

Adding to 123212020 its reverse (20212321), we get a palindrome (143424341).

It can be divided in two parts, 12321 and 2020, that added together give a palindrome (14341).

The spelling of 123212020 in words is "one hundred twenty-three million, two hundred twelve thousand, twenty".