212012134020 has 96 divisors (see below), whose sum is σ = 659870265600. Its totient is φ = 56512829952.

The previous prime is 212012133997. The next prime is 212012134027. The reversal of 212012134020 is 20431210212.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 212012133984 and 212012134002.

It is not an unprimeable number, because it can be changed into a prime (212012134027) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1223961 + ... + 1386399.

It is an arithmetic number, because the mean of its divisors is an integer number (6873648600).

Almost surely, 2^212012134020 is an apocalyptic number.

212012134020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212012134020 is an abundant number, since it is smaller than the sum of its proper divisors (447858131580).

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

212012134020 is a wasteful number, since it uses less digits than its factorization.

212012134020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164874 (or 164866 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 212012134020 its reverse (20431210212), we get a palindrome (232443344232).

The spelling of 212012134020 in words is "two hundred twelve billion, twelve million, one hundred thirty-four thousand, twenty".