201213231100 has 36 divisors (see below), whose sum is σ = 499008814864. Its totient is φ = 68987393280.

The previous prime is 201213231097. The next prime is 201213231113. The reversal of 201213231100 is 1132312102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 143723037 + ... + 143724436.

Almost surely, 2^201213231100 is an apocalyptic number.

201213231100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201213231100 is an abundant number, since it is smaller than the sum of its proper divisors (297795583764).

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

201213231100 is a wasteful number, since it uses less digits than its factorization.

201213231100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287447494 (or 287447487 counting only the distinct ones).

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

Adding to 201213231100 its reverse (1132312102), we get a palindrome (202345543202).

The spelling of 201213231100 in words is "two hundred one billion, two hundred thirteen million, two hundred thirty-one thousand, one hundred".