1232223123121 has 4 divisors (see below), whose sum is σ = 1232293229044. Its totient is φ = 1232153017200.

The previous prime is 1232223123119. The next prime is 1232223123137. The reversal of 1232223123121 is 1213213222321.

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

It can be written as a sum of positive squares in 2 ways, for example, as 134202064896 + 1098021058225 = 366336^2 + 1047865^2 .

It is a cyclic number.

It is not a de Polignac number, because 1232223123121 - 2¹ = 1232223123119 is a prime.

It is a super-2 number, since 2×1232223123121² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1232223123151) 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, 35026590 + ... + 35061751.

It is an arithmetic number, because the mean of its divisors is an integer number (308073307261).

Almost surely, 2^{1232223123121} is an apocalyptic number.

It is an amenable number.

1232223123121 is a deficient number, since it is larger than the sum of its proper divisors (70105923).

1232223123121 is an equidigital number, since it uses as much as digits as its factorization.

1232223123121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70105922.

The product of its digits is 1728, while the sum is 25.

Adding to 1232223123121 its reverse (1213213222321), we get a palindrome (2445436345442).

The spelling of 1232223123121 in words is "one trillion, two hundred thirty-two billion, two hundred twenty-three million, one hundred twenty-three thousand, one hundred twenty-one".