121220111220223 has 4 divisors (see below), whose sum is σ = 121220195080608. Its totient is φ = 121220027359840.

The previous prime is 121220111220217. The next prime is 121220111220227. The reversal of 121220111220223 is 322022111022121.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121220111220223 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121220111220194 and 121220111220203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121220111220227) 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, 39723223 + ... + 42665848.

It is an arithmetic number, because the mean of its divisors is an integer number (30305048770152).

Almost surely, 2^{121220111220223} is an apocalyptic number.

121220111220223 is a deficient number, since it is larger than the sum of its proper divisors (83860385).

121220111220223 is an equidigital number, since it uses as much as digits as its factorization.

121220111220223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83860384.

The product of its (nonzero) digits is 384, while the sum is 22.

Adding to 121220111220223 its reverse (322022111022121), we get a palindrome (443242222242344).

The spelling of 121220111220223 in words is "one hundred twenty-one trillion, two hundred twenty billion, one hundred eleven million, two hundred twenty thousand, two hundred twenty-three".