121102220111 has 4 divisors (see below), whose sum is σ = 121105555800. Its totient is φ = 121098884424.

The previous prime is 121102220077. The next prime is 121102220191. The reversal of 121102220111 is 111022201121.

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 121102220111 - 2¹⁴ = 121102203727 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121102220191) 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, 1612781 + ... + 1686198.

It is an arithmetic number, because the mean of its divisors is an integer number (30276388950).

Almost surely, 2^121102220111 is an apocalyptic number.

121102220111 is a deficient number, since it is larger than the sum of its proper divisors (3335689).

121102220111 is an equidigital number, since it uses as much as digits as its factorization.

121102220111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3335688.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 121102220111 its reverse (111022201121), we get a palindrome (232124421232).

It can be divided in two parts, 1 and 21102220111, that added together give a palindrome (21102220112).

The spelling of 121102220111 in words is "one hundred twenty-one billion, one hundred two million, two hundred twenty thousand, one hundred eleven".