221220111121123 has 8 divisors (see below), whose sum is σ = 234696843960320. Its totient is φ = 207926735191560.

The previous prime is 221220111121069. The next prime is 221220111121151. The reversal of 221220111121123 is 321121111022122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 221220111121123 - 2⁹ = 221220111120611 is a prime.

It is a super-2 number, since 2×221220111121123² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221220111121094 and 221220111121103.

It is not an unprimeable number, because it can be changed into a prime (221220111122123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45839224923 + ... + 45839229748.

It is an arithmetic number, because the mean of its divisors is an integer number (29337105495040).

Almost surely, 2^{221220111121123} is an apocalyptic number.

221220111121123 is a deficient number, since it is larger than the sum of its proper divisors (13476732839197).

221220111121123 is a wasteful number, since it uses less digits than its factorization.

221220111121123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91678454817.

The product of its (nonzero) digits is 192, while the sum is 22.

Adding to 221220111121123 its reverse (321121111022122), we get a palindrome (542341222143245).

Subtracting 221220111121123 from its reverse (321121111022122), we obtain a palindrome (99900999900999).

The spelling of 221220111121123 in words is "two hundred twenty-one trillion, two hundred twenty billion, one hundred eleven million, one hundred twenty-one thousand, one hundred twenty-three".