121221021221123 has 2 divisors, whose sum is σ = 121221021221124. Its totient is φ = 121221021221122.

The previous prime is 121221021221117. The next prime is 121221021221141. The reversal of 121221021221123 is 321122120122121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121221021221123 - 2²⁶ = 121220954112259 is a prime.

It is a super-2 number, since 2×121221021221123² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (121221021221173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60610510610561 + 60610510610562.

It is an arithmetic number, because the mean of its divisors is an integer number (60610510610562).

Almost surely, 2^{121221021221123} is an apocalyptic number.

121221021221123 is a deficient number, since it is larger than the sum of its proper divisors (1).

121221021221123 is an equidigital number, since it uses as much as digits as its factorization.

121221021221123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 384, while the sum is 23.

Adding to 121221021221123 its reverse (321122120122121), we get a palindrome (442343141343244).

The spelling of 121221021221123 in words is "one hundred twenty-one trillion, two hundred twenty-one billion, twenty-one million, two hundred twenty-one thousand, one hundred twenty-three".