121020212323 has 4 divisors (see below), whose sum is σ = 128139048360. Its totient is φ = 113901376288.

The previous prime is 121020212309. The next prime is 121020212381. The reversal of 121020212323 is 323212020121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 323212020121 = 23 ⋅14052696527.

It is a cyclic number.

It is not a de Polignac number, because 121020212323 - 2⁹ = 121020211811 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121020212323.

It is not an unprimeable number, because it can be changed into a prime (121020212023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3559417993 + ... + 3559418026.

It is an arithmetic number, because the mean of its divisors is an integer number (32034762090).

Almost surely, 2^121020212323 is an apocalyptic number.

121020212323 is a deficient number, since it is larger than the sum of its proper divisors (7118836037).

121020212323 is an equidigital number, since it uses as much as digits as its factorization.

121020212323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7118836036.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 121020212323 its reverse (323212020121), we get a palindrome (444232232444).

The spelling of 121020212323 in words is "one hundred twenty-one billion, twenty million, two hundred twelve thousand, three hundred twenty-three".