121011023123 has 4 divisors (see below), whose sum is σ = 127380024360. Its totient is φ = 114642021888.

The previous prime is 121011023101. The next prime is 121011023131. The reversal of 121011023123 is 321320110121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 321320110121 = 173 ⋅1857341677.

It is a cyclic number.

It is not a de Polignac number, because 121011023123 - 2²² = 121006828819 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121011023723) 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, 3184500590 + ... + 3184500627.

It is an arithmetic number, because the mean of its divisors is an integer number (31845006090).

Almost surely, 2^121011023123 is an apocalyptic number.

121011023123 is a deficient number, since it is larger than the sum of its proper divisors (6369001237).

121011023123 is an equidigital number, since it uses as much as digits as its factorization.

121011023123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6369001236.

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

Adding to 121011023123 its reverse (321320110121), we get a palindrome (442331133244).

The spelling of 121011023123 in words is "one hundred twenty-one billion, eleven million, twenty-three thousand, one hundred twenty-three".