111210000012121 has 4 divisors (see below), whose sum is σ = 112230275241700. Its totient is φ = 110189724782544.

The previous prime is 111210000012101. The next prime is 111210000012197. The reversal of 111210000012121 is 121210000012111.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 36834278265625 + 74375721746496 = 6069125^2 + 8624136^2 .

It is a cyclic number.

It is not a de Polignac number, because 111210000012121 - 2⁷ = 111210000011993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111210000012101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 510137614626 + ... + 510137614843.

It is an arithmetic number, because the mean of its divisors is an integer number (28057568810425).

Almost surely, 2^{111210000012121} is an apocalyptic number.

It is an amenable number.

111210000012121 is a deficient number, since it is larger than the sum of its proper divisors (1020275229579).

111210000012121 is a wasteful number, since it uses less digits than its factorization.

111210000012121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1020275229578.

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

Adding to 111210000012121 its reverse (121210000012111), we get a palindrome (232420000024232).

The spelling of 111210000012121 in words is "one hundred eleven trillion, two hundred ten billion, twelve thousand, one hundred twenty-one".