212111321020 has 12 divisors (see below), whose sum is σ = 445433774184. Its totient is φ = 84844528400.

The previous prime is 212111320997. The next prime is 212111321021. The reversal of 212111321020 is 20123111212.

It is a junction number, because it is equal to n+sod(n) for n = 212111320985 and 212111321003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212111321021) 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, 5302783006 + ... + 5302783045.

It is an arithmetic number, because the mean of its divisors is an integer number (37119481182).

Almost surely, 2^212111321020 is an apocalyptic number.

212111321020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212111321020 is an abundant number, since it is smaller than the sum of its proper divisors (233322453164).

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

212111321020 is a wasteful number, since it uses less digits than its factorization.

212111321020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10605566060 (or 10605566058 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 212111321020 its reverse (20123111212), we get a palindrome (232234432232).

The spelling of 212111321020 in words is "two hundred twelve billion, one hundred eleven million, three hundred twenty-one thousand, twenty".