121222100223 has 48 divisors (see below), whose sum is σ = 206669998080. Its totient is φ = 67020861888.

The previous prime is 121222100221. The next prime is 121222100249. The reversal of 121222100223 is 322001222121.

121222100223 is a `hidden beast` number, since 121 + 222 + 100 + 223 = 666.

It is not a de Polignac number, because 121222100223 - 2¹ = 121222100221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121222100196 and 121222100205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121222100221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 271986 + ... + 562512.

It is an arithmetic number, because the mean of its divisors is an integer number (4305624960).

Almost surely, 2^121222100223 is an apocalyptic number.

121222100223 is a deficient number, since it is larger than the sum of its proper divisors (85447897857).

121222100223 is a wasteful number, since it uses less digits than its factorization.

121222100223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 290756 (or 290753 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 121222100223 its reverse (322001222121), we get a palindrome (443223322344).

It can be divided in two parts, 121222 and 100223, that added together give a triangular number (221445 = T₆₆₅).

The spelling of 121222100223 in words is "one hundred twenty-one billion, two hundred twenty-two million, one hundred thousand, two hundred twenty-three".