12121331202 has 48 divisors (see below), whose sum is σ = 27902829240. Its totient is φ = 3795676416.

The previous prime is 12121331099. The next prime is 12121331207. The reversal of 12121331202 is 20213312121.

12121331202 is a `hidden beast` number, since 12 + 121 + 331 + 202 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 9370433601 + 2750897601 = 96801^2 + 52449^2 .

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

It is not an unprimeable number, because it can be changed into a prime (12121331207) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 294483 + ... + 333110.

Almost surely, 2^12121331202 is an apocalyptic number.

12121331202 is an abundant number, since it is smaller than the sum of its proper divisors (15781498038).

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

12121331202 is a wasteful number, since it uses less digits than its factorization.

12121331202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 627667 (or 627664 counting only the distinct ones).

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

Adding to 12121331202 its reverse (20213312121), we get a palindrome (32334643323).

The spelling of 12121331202 in words is "twelve billion, one hundred twenty-one million, three hundred thirty-one thousand, two hundred two".