121331013123 has 16 divisors (see below), whose sum is σ = 175468670496. Its totient is φ = 74272450560.

The previous prime is 121331013101. The next prime is 121331013137. The reversal of 121331013123 is 321310133121.

It is a happy number.

It is not a de Polignac number, because 121331013123 - 2¹⁴ = 121330996739 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121331013123.

It is not an unprimeable number, because it can be changed into a prime (121331013163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29010586 + ... + 29014767.

It is an arithmetic number, because the mean of its divisors is an integer number (10966791906).

Almost surely, 2^121331013123 is an apocalyptic number.

121331013123 is a deficient number, since it is larger than the sum of its proper divisors (54137657373).

121331013123 is a wasteful number, since it uses less digits than its factorization.

121331013123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58025414.

The product of its (nonzero) digits is 324, while the sum is 21.

Adding to 121331013123 its reverse (321310133121), we get a palindrome (442641146244).

The spelling of 121331013123 in words is "one hundred twenty-one billion, three hundred thirty-one million, thirteen thousand, one hundred twenty-three".