121111001210112 has 144 divisors (see below), whose sum is σ = 331213386481152. Its totient is φ = 39259092787200.

The previous prime is 121111001209999. The next prime is 121111001210159. The reversal of 121111001210112 is 211012100111121.

It is a super-2 number, since 2×121111001210112² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 121111001210091 and 121111001210100.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54347338 + ... + 56531894.

Almost surely, 2^{121111001210112} is an apocalyptic number.

121111001210112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121111001210112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (165606693240576).

121111001210112 is an abundant number, since it is smaller than the sum of its proper divisors (210102385271040).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121111001210112 is a wasteful number, since it uses less digits than its factorization.

121111001210112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2186564 (or 2186550 counting only the distinct ones).

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

Adding to 121111001210112 its reverse (211012100111121), we get a palindrome (332123101321233).

The spelling of 121111001210112 in words is "one hundred twenty-one trillion, one hundred eleven billion, one million, two hundred ten thousand, one hundred twelve".