121331002123 has 16 divisors (see below), whose sum is σ = 130176266400. Its totient is φ = 112733337600.

The previous prime is 121331002097. The next prime is 121331002147. The reversal of 121331002123 is 321200133121.

It is a cyclic number.

It is not a de Polignac number, because 121331002123 - 2⁹ = 121331001611 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121331002123.

It is not an unprimeable number, because it can be changed into a prime (121331002223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2786923 + ... + 2830123.

It is an arithmetic number, because the mean of its divisors is an integer number (8136016650).

Almost surely, 2^121331002123 is an apocalyptic number.

121331002123 is a deficient number, since it is larger than the sum of its proper divisors (8845264277).

121331002123 is a wasteful number, since it uses less digits than its factorization.

121331002123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46062.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 121331002123 its reverse (321200133121), we get a palindrome (442531135244).

The spelling of 121331002123 in words is "one hundred twenty-one billion, three hundred thirty-one million, two thousand, one hundred twenty-three".