121112102121 has 4 divisors (see below), whose sum is σ = 161482802832. Its totient is φ = 80741401412.

The previous prime is 121112102119. The next prime is 121112102129. The reversal of 121112102121 is 121201211121.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 121201211121 = 3 ⋅40400403707.

It is a cyclic number.

It is not a de Polignac number, because 121112102121 - 2¹ = 121112102119 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121112102121.

It is not an unprimeable number, because it can be changed into a prime (121112102129) 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, 20185350351 + ... + 20185350356.

It is an arithmetic number, because the mean of its divisors is an integer number (40370700708).

Almost surely, 2^121112102121 is an apocalyptic number.

It is an amenable number.

121112102121 is a deficient number, since it is larger than the sum of its proper divisors (40370700711).

121112102121 is an equidigital number, since it uses as much as digits as its factorization.

121112102121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40370700710.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 121112102121 its reverse (121201211121), we get a palindrome (242313313242).

The spelling of 121112102121 in words is "one hundred twenty-one billion, one hundred twelve million, one hundred two thousand, one hundred twenty-one".