212132130100 has 54 divisors (see below), whose sum is σ = 505978988102. Its totient is φ = 77138952000.

The previous prime is 212132130043. The next prime is 212132130167. The reversal of 212132130100 is 1031231212.

It can be written as a sum of positive squares in 3 ways, for example, as 5483698704 + 206648431396 = 74052^2 + 454586^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 8753691 + ... + 8777890.

Almost surely, 2^212132130100 is an apocalyptic number.

212132130100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212132130100 is an abundant number, since it is smaller than the sum of its proper divisors (293846858002).

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

212132130100 is a wasteful number, since it uses less digits than its factorization.

212132130100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17531617 (or 17531599 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 212132130100 its reverse (1031231212), we get a palindrome (213163361312).

The spelling of 212132130100 in words is "two hundred twelve billion, one hundred thirty-two million, one hundred thirty thousand, one hundred".