21102013202 has 16 divisors (see below), whose sum is σ = 32110297560. Its totient is φ = 10398794112.

The previous prime is 21102013201. The next prime is 21102013211. The reversal of 21102013202 is 20231020112.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 19779890881 + 1322122321 = 140641^2 + 36361^2 .

It is a super-2 number, since 2×21102013202² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21102013201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 147824 + ... + 253092.

Almost surely, 2^21102013202 is an apocalyptic number.

21102013202 is a deficient number, since it is larger than the sum of its proper divisors (11008284358).

21102013202 is a wasteful number, since it uses less digits than its factorization.

21102013202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106717.

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 21102013202 its reverse (20231020112), we get a palindrome (41333033314).

The spelling of 21102013202 in words is "twenty-one billion, one hundred two million, thirteen thousand, two hundred two".