12121000210158 has 128 divisors (see below), whose sum is σ = 29657545128960. Its totient is φ = 3225329280000.

The previous prime is 12121000210157. The next prime is 12121000210159. The reversal of 12121000210158 is 85101200012121.

It is an interprime number because it is at equal distance from previous prime (12121000210157) and next prime (12121000210159).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12121000210157) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 90522858 + ... + 90656658.

It is an arithmetic number, because the mean of its divisors is an integer number (231699571320).

Almost surely, 2^{12121000210158} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12121000210158, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14828772564480).

12121000210158 is an abundant number, since it is smaller than the sum of its proper divisors (17536544918802).

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

12121000210158 is a wasteful number, since it uses less digits than its factorization.

12121000210158 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135754.

The product of its (nonzero) digits is 320, while the sum is 24.

Adding to 12121000210158 its reverse (85101200012121), we get a palindrome (97222200222279).

The spelling of 12121000210158 in words is "twelve trillion, one hundred twenty-one billion, two hundred ten thousand, one hundred fifty-eight".