212321020 has 12 divisors (see below), whose sum is σ = 445874184. Its totient is φ = 84928400.

The previous prime is 212321003. The next prime is 212321051. The reversal of 212321020 is 20123212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5308006 + ... + 5308045.

It is an arithmetic number, because the mean of its divisors is an integer number (37156182).

Almost surely, 2^212321020 is an apocalyptic number.

212321020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212321020 is an abundant number, since it is smaller than the sum of its proper divisors (233553164).

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

212321020 is a wasteful number, since it uses less digits than its factorization.

212321020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10616060 (or 10616058 counting only the distinct ones).

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

The square root of 212321020 is about 14571.2394805658. The cubic root of 212321020 is about 596.5740119470.

Adding to 212321020 its reverse (20123212), we get a palindrome (232444232).

The spelling of 212321020 in words is "two hundred twelve million, three hundred twenty-one thousand, twenty".