12012121010100 has 72 divisors (see below), whose sum is σ = 34906839187360. Its totient is φ = 3189244337280.

The previous prime is 12012121010093. The next prime is 12012121010107. The reversal of 12012121010100 is 101012121021.

It is an interprime number because it is at equal distance from previous prime (12012121010093) and next prime (12012121010107).

It is a super-2 number, since 2×12012121010100² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12012121010107) 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, 87355762 + ... + 87493161.

Almost surely, 2^{12012121010100} is an apocalyptic number.

12012121010100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12012121010100 is an abundant number, since it is smaller than the sum of its proper divisors (22894718177260).

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

12012121010100 is a wasteful number, since it uses less digits than its factorization.

12012121010100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174849169 (or 174849162 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 12012121010100 its reverse (101012121021), we get a palindrome (12113133131121).

The spelling of 12012121010100 in words is "twelve trillion, twelve billion, one hundred twenty-one million, ten thousand, one hundred".