121212100011012 has 24 divisors (see below), whose sum is σ = 287621932231200. Its totient is φ = 39719219212416.

The previous prime is 121212100011001. The next prime is 121212100011019. The reversal of 121212100011012 is 210110001212121.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 121212100010982 and 121212100011000.

It is not an unprimeable number, because it can be changed into a prime (121212100011019) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 85601764837 + ... + 85601766252.

It is an arithmetic number, because the mean of its divisors is an integer number (11984247176300).

Almost surely, 2^{121212100011012} is an apocalyptic number.

121212100011012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

121212100011012 is an abundant number, since it is smaller than the sum of its proper divisors (166409832220188).

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

121212100011012 is a wasteful number, since it uses less digits than its factorization.

121212100011012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171203531155 (or 171203531153 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 121212100011012 its reverse (210110001212121), we get a palindrome (331322101223133).

The spelling of 121212100011012 in words is "one hundred twenty-one trillion, two hundred twelve billion, one hundred million, eleven thousand, twelve".