113233123021 has 4 divisors (see below), whose sum is σ = 117137713500. Its totient is φ = 109328532544.

The previous prime is 113233122991. The next prime is 113233123033. The reversal of 113233123021 is 120321332311.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 120321332311 = 29 ⋅4149011459.

It can be written as a sum of positive squares in 2 ways, for example, as 23675976900 + 89557146121 = 153870^2 + 299261^2 .

It is a cyclic number.

It is not a de Polignac number, because 113233123021 - 2¹⁹ = 113232598733 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 113233122983 and 113233123001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113233123321) 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, 1952295196 + ... + 1952295253.

It is an arithmetic number, because the mean of its divisors is an integer number (29284428375).

Almost surely, 2^113233123021 is an apocalyptic number.

It is an amenable number.

113233123021 is a deficient number, since it is larger than the sum of its proper divisors (3904590479).

113233123021 is an equidigital number, since it uses as much as digits as its factorization.

113233123021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3904590478.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 113233123021 its reverse (120321332311), we get a palindrome (233554455332).

The spelling of 113233123021 in words is "one hundred thirteen billion, two hundred thirty-three million, one hundred twenty-three thousand, twenty-one".