1110111210121 has 4 divisors (see below), whose sum is σ = 1110113320212. Its totient is φ = 1110109100032.

The previous prime is 1110111210107. The next prime is 1110111210149. The reversal of 1110111210121 is 1210121110111.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 685685019721 + 424426190400 = 828061^2 + 651480^2 .

It is a cyclic number.

It is not a de Polignac number, because 1110111210121 - 2⁹ = 1110111209609 is a prime.

It is a super-2 number, since 2×1110111210121² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1110111210821) 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, 445245 + ... + 1555141.

It is an arithmetic number, because the mean of its divisors is an integer number (277528330053).

Almost surely, 2^{1110111210121} is an apocalyptic number.

It is an amenable number.

1110111210121 is a deficient number, since it is larger than the sum of its proper divisors (2110091).

1110111210121 is a wasteful number, since it uses less digits than its factorization.

1110111210121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2110090.

The product of its (nonzero) digits is 4, while the sum is 13.

Adding to 1110111210121 its reverse (1210121110111), we get a palindrome (2320232320232).

The spelling of 1110111210121 in words is "one trillion, one hundred ten billion, one hundred eleven million, two hundred ten thousand, one hundred twenty-one".