212013123730 has 32 divisors (see below), whose sum is σ = 395455919040. Its totient is φ = 81741374400.

The previous prime is 212013123709. The next prime is 212013123731. The reversal of 212013123730 is 37321310212.

It is a happy number.

212013123730 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×212013123730² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 212013123695 and 212013123704.

It is not an unprimeable number, because it can be changed into a prime (212013123731) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 452496 + ... + 792955.

It is an arithmetic number, because the mean of its divisors is an integer number (12357997470).

Almost surely, 2^212013123730 is an apocalyptic number.

212013123730 is a deficient number, since it is larger than the sum of its proper divisors (183442795310).

212013123730 is a wasteful number, since it uses less digits than its factorization.

212013123730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1246074.

The product of its (nonzero) digits is 1512, while the sum is 25.

Adding to 212013123730 its reverse (37321310212), we get a palindrome (249334433942).

The spelling of 212013123730 in words is "two hundred twelve billion, thirteen million, one hundred twenty-three thousand, seven hundred thirty".