12121211002113 has 80 divisors (see below), whose sum is σ = 19355629675536. Its totient is φ = 7532761743360.

The previous prime is 12121211002111. The next prime is 12121211002127. The reversal of 12121211002113 is 31120011212121.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 23252285169 + 12097958716944 = 152487^2 + 3478212^2 .

It is not a de Polignac number, because 12121211002113 - 2¹ = 12121211002111 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12121211002111) by changing a digit.

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 79 ways as a sum of consecutive naturals, for example, 222949053 + ... + 223003413.

Almost surely, 2^{12121211002113} is an apocalyptic number.

It is an amenable number.

12121211002113 is a deficient number, since it is larger than the sum of its proper divisors (7234418673423).

12121211002113 is a wasteful number, since it uses less digits than its factorization.

12121211002113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55936 (or 55927 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 18.

Adding to 12121211002113 its reverse (31120011212121), we get a palindrome (43241222214234).

The spelling of 12121211002113 in words is "twelve trillion, one hundred twenty-one billion, two hundred eleven million, two thousand, one hundred thirteen".