23311021003021 has 4 divisors (see below), whose sum is σ = 24114849313500. Its totient is φ = 22507192692544.

The previous prime is 23311021003003. The next prime is 23311021003027. The reversal of 23311021003021 is 12030012011332.

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 17577936686025 + 5733084316996 = 4192605^2 + 2394386^2 .

It is a cyclic number.

It is not a de Polignac number, because 23311021003021 - 2¹³ = 23311020994829 is a prime.

It is a super-2 number, since 2×23311021003021² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 23311021003021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23311021003027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 401914155196 + ... + 401914155253.

It is an arithmetic number, because the mean of its divisors is an integer number (6028712328375).

Almost surely, 2^{23311021003021} is an apocalyptic number.

It is an amenable number.

23311021003021 is a deficient number, since it is larger than the sum of its proper divisors (803828310479).

23311021003021 is an equidigital number, since it uses as much as digits as its factorization.

23311021003021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 803828310478.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 23311021003021 its reverse (12030012011332), we get a palindrome (35341033014353).

The spelling of 23311021003021 in words is "twenty-three trillion, three hundred eleven billion, twenty-one million, three thousand, twenty-one".