212100012021020 has 48 divisors (see below), whose sum is σ = 449844097500000. Its totient is φ = 83995509523200.

The previous prime is 212100012020993. The next prime is 212100012021031. The reversal of 212100012021020 is 20120210001212.

It is a junction number, because it is equal to n+sod(n) for n = 212100012020986 and 212100012021004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35072831 + ... + 40673129.

It is an arithmetic number, because the mean of its divisors is an integer number (9371752031250).

Almost surely, 2^{212100012021020} is an apocalyptic number.

212100012021020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212100012021020 is an abundant number, since it is smaller than the sum of its proper divisors (237744085478980).

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

212100012021020 is a wasteful number, since it uses less digits than its factorization.

212100012021020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5619158 (or 5619156 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 212100012021020 its reverse (20120210001212), we get a palindrome (232220222022232).

The spelling of 212100012021020 in words is "two hundred twelve trillion, one hundred billion, twelve million, twenty-one thousand, twenty".