21202110213 has 16 divisors (see below), whose sum is σ = 28815951360. Its totient is φ = 13863955824.

The previous prime is 21202110211. The next prime is 21202110229. The reversal of 21202110213 is 31201120212.

It is not a de Polignac number, because 21202110213 - 2¹ = 21202110211 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21202110192 and 21202110201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21202110211) 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, 271681 + ... + 340902.

It is an arithmetic number, because the mean of its divisors is an integer number (1800996960).

Almost surely, 2^21202110213 is an apocalyptic number.

It is an amenable number.

21202110213 is a deficient number, since it is larger than the sum of its proper divisors (7613841147).

21202110213 is a wasteful number, since it uses less digits than its factorization.

21202110213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 612808.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 21202110213 its reverse (31201120212), we get a palindrome (52403230425).

Subtracting 21202110213 from its reverse (31201120212), we obtain a palindrome (9999009999).

The spelling of 21202110213 in words is "twenty-one billion, two hundred two million, one hundred ten thousand, two hundred thirteen".