12011222121002 has 96 divisors (see below), whose sum is σ = 21328163967600. Its totient is φ = 5036161277952.

The previous prime is 12011222121001. The next prime is 12011222121013. The reversal of 12011222121002 is 20012122211021.

It can be written as a sum of positive squares in 24 ways, for example, as 216661389961 + 11794560731041 = 465469^2 + 3434321^2 .

It is a Harshad number since it is a multiple of its sum of digits (17).

It is not an unprimeable number, because it can be changed into a prime (12011222121001) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1082769368 + ... + 1082780460.

Almost surely, 2^{12011222121002} is an apocalyptic number.

12011222121002 is a deficient number, since it is larger than the sum of its proper divisors (9316941846598).

12011222121002 is a wasteful number, since it uses less digits than its factorization.

12011222121002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16140 (or 16123 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 12011222121002 its reverse (20012122211021), we get a palindrome (32023344332023).

The spelling of 12011222121002 in words is "twelve trillion, eleven billion, two hundred twenty-two million, one hundred twenty-one thousand, two".