212013123732 has 60 divisors (see below), whose sum is σ = 554891637300. Its totient is φ = 70588485504.

The previous prime is 212013123731. The next prime is 212013123787. The reversal of 212013123732 is 237321310212.

212013123732 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 2 ways, for example, as 179340392196 + 32672731536 = 423486^2 + 180756^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 212013123696 and 212013123705.

It is a congruent number.

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 19 ways as a sum of consecutive naturals, for example, 104107 + ... + 659442.

It is an arithmetic number, because the mean of its divisors is an integer number (9248193955).

Almost surely, 2^212013123732 is an apocalyptic number.

It is an amenable number.

212013123732 is an abundant number, since it is smaller than the sum of its proper divisors (342878513568).

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

212013123732 is a wasteful number, since it uses less digits than its factorization.

212013123732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 764422 (or 764411 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 27.

Adding to 212013123732 its reverse (237321310212), we get a palindrome (449334433944).

The spelling of 212013123732 in words is "two hundred twelve billion, thirteen million, one hundred twenty-three thousand, seven hundred thirty-two".