21032102213 has 8 divisors (see below), whose sum is σ = 21082135032. Its totient is φ = 20982114496.

The previous prime is 21032102159. The next prime is 21032102219. The reversal of 21032102213 is 31220123012.

It can be written as a sum of positive squares in 4 ways, for example, as 70274689 + 20961827524 = 8383^2 + 144782^2 .

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 21032102213 - 2⁶ = 21032102149 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21032102191 and 21032102200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21032102219) 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, 1035431 + ... + 1055547.

It is an arithmetic number, because the mean of its divisors is an integer number (2635266879).

Almost surely, 2^21032102213 is an apocalyptic number.

It is an amenable number.

21032102213 is a deficient number, since it is larger than the sum of its proper divisors (50032819).

21032102213 is a wasteful number, since it uses less digits than its factorization.

21032102213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22551.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 21032102213 its reverse (31220123012), we get a palindrome (52252225225).

The spelling of 21032102213 in words is "twenty-one billion, thirty-two million, one hundred two thousand, two hundred thirteen".