12121203132 has 18 divisors (see below), whose sum is σ = 30639708008. Its totient is φ = 4040401032.

The previous prime is 12121203047. The next prime is 12121203161. The reversal of 12121203132 is 23130212121.

It is a tau number, because it is divible by the number of its divisors (18).

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

It is a congruent number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 168350008 + ... + 168350079.

Almost surely, 2^12121203132 is an apocalyptic number.

12121203132 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12121203132 is an abundant number, since it is smaller than the sum of its proper divisors (18518504876).

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

12121203132 is a wasteful number, since it uses less digits than its factorization.

12121203132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 336700097 (or 336700092 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 12121203132 its reverse (23130212121), we get a palindrome (35251415253).

The spelling of 12121203132 in words is "twelve billion, one hundred twenty-one million, two hundred three thousand, one hundred thirty-two".