121110201022111 has 4 divisors (see below), whose sum is σ = 138411658310992. Its totient is φ = 103808743733232.

The previous prime is 121110201022007. The next prime is 121110201022133. The reversal of 121110201022111 is 111220102011121.

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 121110201022111 - 2¹⁵ = 121110200989343 is a prime.

It is a super-2 number, since 2×121110201022111² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121110201022211) 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, 8650728644430 + ... + 8650728644443.

It is an arithmetic number, because the mean of its divisors is an integer number (34602914577748).

Almost surely, 2^{121110201022111} is an apocalyptic number.

121110201022111 is a deficient number, since it is larger than the sum of its proper divisors (17301457288881).

121110201022111 is an equidigital number, since it uses as much as digits as its factorization.

121110201022111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17301457288880.

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

Adding to 121110201022111 its reverse (111220102011121), we get a palindrome (232330303033232).

It can be divided in two parts, 12111020 and 1022111, that added together give a palindrome (13133131).

The spelling of 121110201022111 in words is "one hundred twenty-one trillion, one hundred ten billion, two hundred one million, twenty-two thousand, one hundred eleven".