212321001340 has 36 divisors (see below), whose sum is σ = 518669877096. Its totient is φ = 72795771552.

The previous prime is 212321001281. The next prime is 212321001377. The reversal of 212321001340 is 43100123212.

It is a happy number.

It is a super-2 number, since 2×212321001340² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 108326062 + ... + 108328021.

It is an arithmetic number, because the mean of its divisors is an integer number (14407496586).

Almost surely, 2^212321001340 is an apocalyptic number.

212321001340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212321001340 is an abundant number, since it is smaller than the sum of its proper divisors (306348875756).

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

212321001340 is a wasteful number, since it uses less digits than its factorization.

212321001340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216654106 (or 216654097 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 212321001340 its reverse (43100123212), we get a palindrome (255421124552).

The spelling of 212321001340 in words is "two hundred twelve billion, three hundred twenty-one million, one thousand, three hundred forty".