121011110020111 has 4 divisors (see below), whose sum is σ = 123585814488672. Its totient is φ = 118436405551552.

The previous prime is 121011110020037. The next prime is 121011110020139. The reversal of 121011110020111 is 111020011110121.

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 121011110020111 - 2¹⁹ = 121011109495823 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121011110020091 and 121011110020100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121011110029111) 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, 1287352234210 + ... + 1287352234303.

It is an arithmetic number, because the mean of its divisors is an integer number (30896453622168).

Almost surely, 2^{121011110020111} is an apocalyptic number.

121011110020111 is a deficient number, since it is larger than the sum of its proper divisors (2574704468561).

121011110020111 is an equidigital number, since it uses as much as digits as its factorization.

121011110020111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2574704468560.

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

Adding to 121011110020111 its reverse (111020011110121), we get a palindrome (232031121130232).

The spelling of 121011110020111 in words is "one hundred twenty-one trillion, eleven billion, one hundred ten million, twenty thousand, one hundred eleven".