121512023 has 4 divisors (see below), whose sum is σ = 124337928. Its totient is φ = 118686120.

The previous prime is 121512007. The next prime is 121512029. The reversal of 121512023 is 320215121.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 320215121 = 5417 ⋅59113.

It is a cyclic number.

It is not a de Polignac number, because 121512023 - 2⁴ = 121512007 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121511992 and 121512010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121512029) 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, 1412888 + ... + 1412973.

It is an arithmetic number, because the mean of its divisors is an integer number (31084482).

Almost surely, 2^121512023 is an apocalyptic number.

121512023 is a deficient number, since it is larger than the sum of its proper divisors (2825905).

121512023 is an equidigital number, since it uses as much as digits as its factorization.

121512023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2825904.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 121512023 is about 11023.2492033883. The cubic root of 121512023 is about 495.3054238617.

Adding to 121512023 its reverse (320215121), we get a palindrome (441727144).

The spelling of 121512023 in words is "one hundred twenty-one million, five hundred twelve thousand, twenty-three".