121131020123 has 8 divisors (see below), whose sum is σ = 123056575488. Its totient is φ = 119216563624.

The previous prime is 121131020107. The next prime is 121131020149. The reversal of 121131020123 is 321020131121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 121131020123 - 2⁴ = 121131020107 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121131026123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2752715 + ... + 2796372.

It is an arithmetic number, because the mean of its divisors is an integer number (15382071936).

Almost surely, 2^121131020123 is an apocalyptic number.

121131020123 is a deficient number, since it is larger than the sum of its proper divisors (1925555365).

121131020123 is an equidigital number, since it uses as much as digits as its factorization.

121131020123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5549433.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 121131020123 its reverse (321020131121), we get a palindrome (442151151244).

The spelling of 121131020123 in words is "one hundred twenty-one billion, one hundred thirty-one million, twenty thousand, one hundred twenty-three".