21212000203023 has 96 divisors (see below), whose sum is σ = 38482723910400. Its totient is φ = 11482321209408.

The previous prime is 21212000203021. The next prime is 21212000203103. The reversal of 21212000203023 is 32030200021212.

It is not a de Polignac number, because 21212000203023 - 2¹ = 21212000203021 is a prime.

It is a super-2 number, since 2×21212000203023² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21212000202987 and 21212000203005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21212000203021) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 472226361 + ... + 472271277.

It is an arithmetic number, because the mean of its divisors is an integer number (400861707400).

Almost surely, 2^{21212000203023} is an apocalyptic number.

21212000203023 is a deficient number, since it is larger than the sum of its proper divisors (17270723707377).

21212000203023 is a wasteful number, since it uses less digits than its factorization.

21212000203023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63746 (or 63733 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 21212000203023 its reverse (32030200021212), we get a palindrome (53242200224235).

The spelling of 21212000203023 in words is "twenty-one trillion, two hundred twelve billion, two hundred three thousand, twenty-three".