1111212110121 has 12 divisors (see below), whose sum is σ = 1522742093712. Its totient is φ = 720786230928.

The previous prime is 1111212110117. The next prime is 1111212110189. The reversal of 1111212110121 is 1210112121111.

It is not a de Polignac number, because 1111212110121 - 2² = 1111212110117 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1111212110121.

It is not an unprimeable number, because it can be changed into a prime (1111212110521) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 135278595 + ... + 135286808.

It is an arithmetic number, because the mean of its divisors is an integer number (126895174476).

Almost surely, 2^{1111212110121} is an apocalyptic number.

It is an amenable number.

1111212110121 is a deficient number, since it is larger than the sum of its proper divisors (411529983591).

1111212110121 is an equidigital number, since it uses as much as digits as its factorization.

1111212110121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270565480 (or 270565443 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 15.

Adding to 1111212110121 its reverse (1210112121111), we get a palindrome (2321324231232).

The spelling of 1111212110121 in words is "one trillion, one hundred eleven billion, two hundred twelve million, one hundred ten thousand, one hundred twenty-one".