121220314423 has 6 divisors (see below), whose sum is σ = 131262234144. Its totient is φ = 111895674696.

The previous prime is 121220314417. The next prime is 121220314441. The reversal of 121220314423 is 324413022121.

It is not a de Polignac number, because 121220314423 - 2²⁹ = 120683443511 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121220314463) 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, 358639815 + ... + 358640152.

It is an arithmetic number, because the mean of its divisors is an integer number (21877039024).

Almost surely, 2^121220314423 is an apocalyptic number.

121220314423 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

121220314423 is a deficient number, since it is larger than the sum of its proper divisors (10041919721).

121220314423 is an equidigital number, since it uses as much as digits as its factorization.

121220314423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 717279993 (or 717279980 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 121220314423 its reverse (324413022121), we get a palindrome (445633336544).

The spelling of 121220314423 in words is "one hundred twenty-one billion, two hundred twenty million, three hundred fourteen thousand, four hundred twenty-three".