212103134020 has 24 divisors (see below), whose sum is σ = 446821694424. Its totient is φ = 84573613056.

The previous prime is 212103133973. The next prime is 212103134021. The reversal of 212103134020 is 20431301212.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 35662811716 + 176440322304 = 188846^2 + 420048^2 .

It is a super-2 number, since 2×212103134020² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (212103134021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16721037 + ... + 16733716.

It is an arithmetic number, because the mean of its divisors is an integer number (18617570601).

Almost surely, 2^212103134020 is an apocalyptic number.

212103134020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212103134020 is an abundant number, since it is smaller than the sum of its proper divisors (234718560404).

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

212103134020 is a wasteful number, since it uses less digits than its factorization.

212103134020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33455079 (or 33455077 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 212103134020 its reverse (20431301212), we get a palindrome (232534435232).

The spelling of 212103134020 in words is "two hundred twelve billion, one hundred three million, one hundred thirty-four thousand, twenty".