1212112100101 has 32 divisors (see below), whose sum is σ = 1446251788800. Its totient is φ = 993912595200.

The previous prime is 1212112100099. The next prime is 1212112100117. The reversal of 1212112100101 is 1010012112121.

It is a happy number.

It is not a de Polignac number, because 1212112100101 - 2¹ = 1212112100099 is a prime.

It is a super-2 number, since 2×1212112100101² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212112100401) 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 31 ways as a sum of consecutive naturals, for example, 11873191 + ... + 11974843.

It is an arithmetic number, because the mean of its divisors is an integer number (45195368400).

Almost surely, 2^{1212112100101} is an apocalyptic number.

It is an amenable number.

1212112100101 is a deficient number, since it is larger than the sum of its proper divisors (234139688699).

1212112100101 is a wasteful number, since it uses less digits than its factorization.

1212112100101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102229.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 1212112100101 its reverse (1010012112121), we get a palindrome (2222124212222).

The spelling of 1212112100101 in words is "one trillion, two hundred twelve billion, one hundred twelve million, one hundred thousand, one hundred one".