212100001012220 has 96 divisors (see below), whose sum is σ = 450226746144000. Its totient is φ = 83927462621184.

The previous prime is 212100001012169. The next prime is 212100001012223. The reversal of 212100001012220 is 22210100001212.

It is a junction number, because it is equal to n+sod(n) for n = 212100001012195 and 212100001012204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212100001012223) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3488858144 + ... + 3488918936.

It is an arithmetic number, because the mean of its divisors is an integer number (4689861939000).

Almost surely, 2^{212100001012220} is an apocalyptic number.

212100001012220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212100001012220 is an abundant number, since it is smaller than the sum of its proper divisors (238126745131780).

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

212100001012220 is a wasteful number, since it uses less digits than its factorization.

212100001012220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65847 (or 65845 counting only the distinct ones).

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

Adding to 212100001012220 its reverse (22210100001212), we get a palindrome (234310101013432).

The spelling of 212100001012220 in words is "two hundred twelve trillion, one hundred billion, one million, twelve thousand, two hundred twenty".