23311212203021 has 4 divisors (see below), whose sum is σ = 23440003430844. Its totient is φ = 23182420975200.

The previous prime is 23311212203003. The next prime is 23311212203023. The reversal of 23311212203021 is 12030221211332.

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 149958690025 + 23161253512996 = 387245^2 + 4812614^2 .

It is a cyclic number.

It is not a de Polignac number, because 23311212203021 - 2¹⁰ = 23311212201997 is a prime.

It is a super-2 number, since 2×23311212203021² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23311212203023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64395613640 + ... + 64395614001.

It is an arithmetic number, because the mean of its divisors is an integer number (5860000857711).

Almost surely, 2^{23311212203021} is an apocalyptic number.

It is an amenable number.

23311212203021 is a deficient number, since it is larger than the sum of its proper divisors (128791227823).

23311212203021 is a wasteful number, since it uses less digits than its factorization.

23311212203021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128791227822.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 23311212203021 its reverse (12030221211332), we get a palindrome (35341433414353).

The spelling of 23311212203021 in words is "twenty-three trillion, three hundred eleven billion, two hundred twelve million, two hundred three thousand, twenty-one".