212100121002220 has 96 divisors (see below), whose sum is σ = 499700651788800. Its totient is φ = 74955096437760.

The previous prime is 212100121002197. The next prime is 212100121002247. The reversal of 212100121002220 is 22200121001212.

It is a happy number.

It is a super-2 number, since 2×212100121002220² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 212100121002194 and 212100121002203.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 54450957 + ... + 58216036.

It is an arithmetic number, because the mean of its divisors is an integer number (5205215122800).

Almost surely, 2^{212100121002220} is an apocalyptic number.

212100121002220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212100121002220 is an abundant number, since it is smaller than the sum of its proper divisors (287600530786580).

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

212100121002220 is a wasteful number, since it uses less digits than its factorization.

212100121002220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112667255 (or 112667253 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 212100121002220 its reverse (22200121001212), we get a palindrome (234300242003432).

The spelling of 212100121002220 in words is "two hundred twelve trillion, one hundred billion, one hundred twenty-one million, two thousand, two hundred twenty".