21211202110023 has 16 divisors (see below), whose sum is σ = 31671436226560. Its totient is φ = 14029456511448.

The previous prime is 21211202109917. The next prime is 21211202110057. The reversal of 21211202110023 is 32001120211212.

It is not a de Polignac number, because 21211202110023 - 2²⁶ = 21211135001159 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21211202109978 and 21211202110005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21211202180023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3092910265 + ... + 3092917122.

It is an arithmetic number, because the mean of its divisors is an integer number (1979464764160).

Almost surely, 2^{21211202110023} is an apocalyptic number.

21211202110023 is a deficient number, since it is larger than the sum of its proper divisors (10460234116537).

21211202110023 is a wasteful number, since it uses less digits than its factorization.

21211202110023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6185827523 (or 6185827517 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 21211202110023 its reverse (32001120211212), we get a palindrome (53212322321235).

The spelling of 21211202110023 in words is "twenty-one trillion, two hundred eleven billion, two hundred two million, one hundred ten thousand, twenty-three".