1212101002111 has 16 divisors (see below), whose sum is σ = 1241068356864. Its totient is φ = 1183494115584.

The previous prime is 1212101002103. The next prime is 1212101002253. The reversal of 1212101002111 is 1112001012121.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1212101002111 - 2³ = 1212101002103 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1212101002091 and 1212101002100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212101009111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3796276 + ... + 4103158.

It is an arithmetic number, because the mean of its divisors is an integer number (77566772304).

Almost surely, 2^{1212101002111} is an apocalyptic number.

1212101002111 is a deficient number, since it is larger than the sum of its proper divisors (28967354753).

1212101002111 is a wasteful number, since it uses less digits than its factorization.

1212101002111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 307470.

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

Adding to 1212101002111 its reverse (1112001012121), we get a palindrome (2324102014232).

The spelling of 1212101002111 in words is "one trillion, two hundred twelve billion, one hundred one million, two thousand, one hundred eleven".