121023123031123 has 4 divisors (see below), whose sum is σ = 122094124120008. Its totient is φ = 119952121942240.

The previous prime is 121023123031117. The next prime is 121023123031133. The reversal of 121023123031123 is 321130321320121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 121023123031123 - 2¹⁷ = 121023122900051 is a prime.

It is a super-3 number, since 3×121023123031123³ (a number of 43 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121023123031133) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 535500544273 + ... + 535500544498.

It is an arithmetic number, because the mean of its divisors is an integer number (30523531030002).

Almost surely, 2^{121023123031123} is an apocalyptic number.

121023123031123 is a deficient number, since it is larger than the sum of its proper divisors (1071001088885).

121023123031123 is a wasteful number, since it uses less digits than its factorization.

121023123031123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1071001088884.

The product of its (nonzero) digits is 1296, while the sum is 25.

Adding to 121023123031123 its reverse (321130321320121), we get a palindrome (442153444351244).

The spelling of 121023123031123 in words is "one hundred twenty-one trillion, twenty-three billion, one hundred twenty-three million, thirty-one thousand, one hundred twenty-three".