121021022123 has 4 divisors (see below), whose sum is σ = 121337004288. Its totient is φ = 120705039960.

The previous prime is 121021022107. The next prime is 121021022131. The reversal of 121021022123 is 321220120121.

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 121021022123 - 2⁴ = 121021022107 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121021022323) 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, 157990508 + ... + 157991273.

It is an arithmetic number, because the mean of its divisors is an integer number (30334251072).

Almost surely, 2^121021022123 is an apocalyptic number.

121021022123 is a deficient number, since it is larger than the sum of its proper divisors (315982165).

121021022123 is an equidigital number, since it uses as much as digits as its factorization.

121021022123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315982164.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 121021022123 its reverse (321220120121), we get a palindrome (442241142244).

The spelling of 121021022123 in words is "one hundred twenty-one billion, twenty-one million, twenty-two thousand, one hundred twenty-three".