211212020020 has 24 divisors (see below), whose sum is σ = 443557888200. Its totient is φ = 84482399232.

The previous prime is 211212020017. The next prime is 211212020051. The reversal of 211212020020 is 20020212112.

It is a happy number.

211212020020 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 26831095204 + 184380924816 = 163802^2 + 429396^2 .

It is a super-2 number, since 2×211212020020² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 680296 + ... + 940864.

It is an arithmetic number, because the mean of its divisors is an integer number (18481578675).

Almost surely, 2^211212020020 is an apocalyptic number.

211212020020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211212020020 is an abundant number, since it is smaller than the sum of its proper divisors (232345868180).

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

211212020020 is a wasteful number, since it uses less digits than its factorization.

211212020020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 301107 (or 301105 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 211212020020 its reverse (20020212112), we get a palindrome (231232232132).

The spelling of 211212020020 in words is "two hundred eleven billion, two hundred twelve million, twenty thousand, twenty".