111212200012121 has 8 divisors (see below), whose sum is σ = 119840147134344. Its totient is φ = 102594704676480.

The previous prime is 111212200012079. The next prime is 111212200012129. The reversal of 111212200012121 is 121210002212111.

It can be written as a sum of positive squares in 4 ways, for example, as 2339566030096 + 108872633982025 = 1529564^2 + 10434205^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 111212200012121 - 2¹⁰ = 111212200011097 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 111212200012121.

It is not an unprimeable number, because it can be changed into a prime (111212200012129) 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, 2612924540 + ... + 2612967101.

It is an arithmetic number, because the mean of its divisors is an integer number (14980018391793).

Almost surely, 2^{111212200012121} is an apocalyptic number.

It is an amenable number.

111212200012121 is a deficient number, since it is larger than the sum of its proper divisors (8627947122223).

111212200012121 is a wasteful number, since it uses less digits than its factorization.

111212200012121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5225893291.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 111212200012121 its reverse (121210002212111), we get a palindrome (232422202224232).

The spelling of 111212200012121 in words is "one hundred eleven trillion, two hundred twelve billion, two hundred million, twelve thousand, one hundred twenty-one".