121000100012111 has 4 divisors (see below), whose sum is σ = 121000123243824. Its totient is φ = 121000076780400.

The previous prime is 121000100012089. The next prime is 121000100012153. The reversal of 121000100012111 is 111210001000121.

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

It is a cyclic number.

It is not a de Polignac number, because 121000100012111 - 2²⁶ = 121000032903247 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121000100012092 and 121000100012101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121000100512111) 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, 209891 + ... + 15557771.

It is an arithmetic number, because the mean of its divisors is an integer number (30250030810956).

Almost surely, 2^{121000100012111} is an apocalyptic number.

121000100012111 is a deficient number, since it is larger than the sum of its proper divisors (23231713).

121000100012111 is an equidigital number, since it uses as much as digits as its factorization.

121000100012111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23231712.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 121000100012111 its reverse (111210001000121), we get a palindrome (232210101012232).

It can be divided in two parts, 1210001000121 and 11, that multiplied together give a palindrome (13310011001331).

The spelling of 121000100012111 in words is "one hundred twenty-one trillion, one hundred million, twelve thousand, one hundred eleven".