212310201220 has 144 divisors (see below), whose sum is σ = 494857883520. Its totient is φ = 76437623808.

The previous prime is 212310201157. The next prime is 212310201251. The reversal of 212310201220 is 22102013212.

It is a happy number.

It is a super-3 number, since 3×212310201220³ (a number of 35 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 212310201194 and 212310201203.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 136182801 + ... + 136184359.

It is an arithmetic number, because the mean of its divisors is an integer number (3436513080).

Almost surely, 2^212310201220 is an apocalyptic number.

212310201220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 212310201220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (247428941760).

212310201220 is an abundant number, since it is smaller than the sum of its proper divisors (282547682300).

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

212310201220 is a wasteful number, since it uses less digits than its factorization.

212310201220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2574 (or 2559 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 212310201220 its reverse (22102013212), we get a palindrome (234412214432).

The spelling of 212310201220 in words is "two hundred twelve billion, three hundred ten million, two hundred one thousand, two hundred twenty".