213123213020 has 12 divisors (see below), whose sum is σ = 447558747384. Its totient is φ = 85249285200.

The previous prime is 213123213001. The next prime is 213123213053. The reversal of 213123213020 is 20312321312.

213123213020 is digitally balanced in base 2, because in such base 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 (20), and also a Moran number because the ratio is a prime number: 10656160651 = 213123213020 / (2 + 1 + 3 + 1 + 2 + 3 + 2 + 1 + 3 + 0 + 2 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 213123212983 and 213123213001.

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 3 ways as a sum of consecutive naturals, for example, 5328080306 + ... + 5328080345.

It is an arithmetic number, because the mean of its divisors is an integer number (37296562282).

Almost surely, 2^213123213020 is an apocalyptic number.

213123213020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

213123213020 is an abundant number, since it is smaller than the sum of its proper divisors (234435534364).

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

213123213020 is a wasteful number, since it uses less digits than its factorization.

213123213020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10656160660 (or 10656160658 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 213123213020 its reverse (20312321312), we get a palindrome (233435534332).

The spelling of 213123213020 in words is "two hundred thirteen billion, one hundred twenty-three million, two hundred thirteen thousand, twenty".