123322210121 has 4 divisors (see below), whose sum is σ = 134533320144. Its totient is φ = 112111100100.

The previous prime is 123322210097. The next prime is 123322210147. The reversal of 123322210121 is 121012223321.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 121012223321 = 11 ⋅11001111211.

It is a cyclic number.

It is not a de Polignac number, because 123322210121 - 2⁶ = 123322210057 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 123322210093 and 123322210102.

It is not an unprimeable number, because it can be changed into a prime (123322210181) 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, 5605554995 + ... + 5605555016.

It is an arithmetic number, because the mean of its divisors is an integer number (33633330036).

Almost surely, 2^123322210121 is an apocalyptic number.

123322210121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

123322210121 is a deficient number, since it is larger than the sum of its proper divisors (11211110023).

123322210121 is a wasteful number, since it uses less digits than its factorization.

123322210121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11211110022.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 123322210121 its reverse (121012223321), we get a palindrome (244334433442).

The spelling of 123322210121 in words is "one hundred twenty-three billion, three hundred twenty-two million, two hundred ten thousand, one hundred twenty-one".