123221021212133 has 4 divisors (see below), whose sum is σ = 132699561305388. Its totient is φ = 113742481118880.

The previous prime is 123221021212103. The next prime is 123221021212153. The reversal of 123221021212133 is 331212120122321.

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 7716628405924 + 115504392806209 = 2777882^2 + 10747297^2 .

It is a cyclic number.

It is not a de Polignac number, because 123221021212133 - 2⁸ = 123221021211877 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123221021212103) 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, 4739270046608 + ... + 4739270046633.

It is an arithmetic number, because the mean of its divisors is an integer number (33174890326347).

Almost surely, 2^{123221021212133} is an apocalyptic number.

123221021212133 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

123221021212133 is a deficient number, since it is larger than the sum of its proper divisors (9478540093255).

123221021212133 is an equidigital number, since it uses as much as digits as its factorization.

123221021212133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9478540093254.

The product of its (nonzero) digits is 1728, while the sum is 26.

Adding to 123221021212133 its reverse (331212120122321), we get a palindrome (454433141334454).

The spelling of 123221021212133 in words is "one hundred twenty-three trillion, two hundred twenty-one billion, twenty-one million, two hundred twelve thousand, one hundred thirty-three".