213123100000 has 72 divisors (see below), whose sum is σ = 524449308096. Its totient is φ = 85249200000.

The previous prime is 213123099991. The next prime is 213123100007. The reversal of 213123100000 is 1321312.

It is a super-2 number, since 2×213123100000² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213123100007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 965616 + ... + 1165615.

It is an arithmetic number, because the mean of its divisors is an integer number (7284018168).

Almost surely, 2^213123100000 is an apocalyptic number.

213123100000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

213123100000 is an abundant number, since it is smaller than the sum of its proper divisors (311326208096).

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

213123100000 is an frugal number, since it uses more digits than its factorization.

213123100000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2131266 (or 2131238 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 13.

Adding to 213123100000 its reverse (1321312), we get a palindrome (213124421312).

The spelling of 213123100000 in words is "two hundred thirteen billion, one hundred twenty-three million, one hundred thousand".