21311202102023 has 8 divisors (see below), whose sum is σ = 21454911870000. Its totient is φ = 21167501421888.

The previous prime is 21311202102019. The next prime is 21311202102037. The reversal of 21311202102023 is 32020120211312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21311202102023 - 2² = 21311202102019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21311202101986 and 21311202102004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21311202102623) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2467115 + ... + 6979187.

It is an arithmetic number, because the mean of its divisors is an integer number (2681863983750).

Almost surely, 2^{21311202102023} is an apocalyptic number.

21311202102023 is a deficient number, since it is larger than the sum of its proper divisors (143709767977).

21311202102023 is a wasteful number, since it uses less digits than its factorization.

21311202102023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4543921.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 21311202102023 its reverse (32020120211312), we get a palindrome (53331322313335).

The spelling of 21311202102023 in words is "twenty-one trillion, three hundred eleven billion, two hundred two million, one hundred two thousand, twenty-three".