212131030310220 has 192 divisors, whose sum is σ = 700769496784896. Its totient is φ = 46919456962560.

The previous prime is 212131030310203. The next prime is 212131030310233. The reversal of 212131030310220 is 22013030131212.

212131030310220 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 174082174 + ... + 175296506.

It is an arithmetic number, because the mean of its divisors is an integer number (3649841129088).

Almost surely, 2^{212131030310220} is an apocalyptic number.

212131030310220 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 212131030310220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (350384748392448).

212131030310220 is an abundant number, since it is smaller than the sum of its proper divisors (488638466474676).

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

212131030310220 is a wasteful number, since it uses less digits than its factorization.

212131030310220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1227800 (or 1227798 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 212131030310220 its reverse (22013030131212), we get a palindrome (234144060441432).

The spelling of 212131030310220 in words is "two hundred twelve trillion, one hundred thirty-one billion, thirty million, three hundred ten thousand, two hundred twenty".