121122221313123 has 6 divisors (see below), whose sum is σ = 174954319674524. Its totient is φ = 80748147542076.

The previous prime is 121122221313109. The next prime is 121122221313157. The reversal of 121122221313123 is 321313122221121.

121122221313123 is a `hidden beast` number, since 1 + 2 + 1 + 1 + 2 + 2 + 221 + 313 + 123 = 666.

It is not a de Polignac number, because 121122221313123 - 2¹⁷ = 121122221182051 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121122221313173) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6729012295165 + ... + 6729012295182.

Almost surely, 2^{121122221313123} is an apocalyptic number.

121122221313123 is a deficient number, since it is larger than the sum of its proper divisors (53832098361401).

121122221313123 is a wasteful number, since it uses less digits than its factorization.

121122221313123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13458024590353 (or 13458024590350 counting only the distinct ones).

The product of its digits is 1728, while the sum is 27.

Adding to 121122221313123 its reverse (321313122221121), we get a palindrome (442435343534244).

The spelling of 121122221313123 in words is "one hundred twenty-one trillion, one hundred twenty-two billion, two hundred twenty-one million, three hundred thirteen thousand, one hundred twenty-three".