121201023421023 has 64 divisors (see below), whose sum is σ = 199934386025472. Its totient is φ = 63595828961280.

The previous prime is 121201023420973. The next prime is 121201023421069. The reversal of 121201023421023 is 320124320102121.

It is not a de Polignac number, because 121201023421023 - 2¹³ = 121201023412831 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121201023420984 and 121201023421002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121201023421123) 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 63 ways as a sum of consecutive naturals, for example, 1392895588 + ... + 1392982598.

It is an arithmetic number, because the mean of its divisors is an integer number (3123974781648).

Almost surely, 2^{121201023421023} is an apocalyptic number.

121201023421023 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

121201023421023 is a deficient number, since it is larger than the sum of its proper divisors (78733362604449).

121201023421023 is a wasteful number, since it uses less digits than its factorization.

121201023421023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113664.

The product of its (nonzero) digits is 1152, while the sum is 24.

Adding to 121201023421023 its reverse (320124320102121), we get a palindrome (441325343523144).

The spelling of 121201023421023 in words is "one hundred twenty-one trillion, two hundred one billion, twenty-three million, four hundred twenty-one thousand, twenty-three".