121201120221123 has 4 divisors (see below), whose sum is σ = 161601493628168. Its totient is φ = 80800746814080.

The previous prime is 121201120221121. The next prime is 121201120221149. The reversal of 121201120221123 is 321122021102121.

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

It is not a de Polignac number, because 121201120221123 - 2¹ = 121201120221121 is a prime.

It is a super-2 number, since 2×121201120221123² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121201120221123.

It is not an unprimeable number, because it can be changed into a prime (121201120221121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20200186703518 + ... + 20200186703523.

It is an arithmetic number, because the mean of its divisors is an integer number (40400373407042).

Almost surely, 2^{121201120221123} is an apocalyptic number.

121201120221123 is a deficient number, since it is larger than the sum of its proper divisors (40400373407045).

121201120221123 is an equidigital number, since it uses as much as digits as its factorization.

121201120221123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40400373407044.

The product of its (nonzero) digits is 192, while the sum is 21.

Adding to 121201120221123 its reverse (321122021102121), we get a palindrome (442323141323244).

The spelling of 121201120221123 in words is "one hundred twenty-one trillion, two hundred one billion, one hundred twenty million, two hundred twenty-one thousand, one hundred twenty-three".