213111302020 has 24 divisors (see below), whose sum is σ = 447546789144. Its totient is φ = 85242034176.

The previous prime is 213111301957. The next prime is 213111302051. The reversal of 213111302020 is 20203111312.

213111302020 is digitally balanced in base 2, because in such base 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 27508876164 + 185602425856 = 165858^2 + 430816^2 .

It is a junction number, because it is equal to n+sod(n) for n = 213111301985 and 213111302003.

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, 648862 + ... + 920458.

It is an arithmetic number, because the mean of its divisors is an integer number (18647782881).

Almost surely, 2^213111302020 is an apocalyptic number.

213111302020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

213111302020 is an abundant number, since it is smaller than the sum of its proper divisors (234435487124).

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

213111302020 is a wasteful number, since it uses less digits than its factorization.

213111302020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310839 (or 310837 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 213111302020 its reverse (20203111312), we get a palindrome (233314413332).

The spelling of 213111302020 in words is "two hundred thirteen billion, one hundred eleven million, three hundred two thousand, twenty".