21010201213 has 8 divisors (see below), whose sum is σ = 23013202680. Its totient is φ = 19092433920.

The previous prime is 21010201193. The next prime is 21010201229. The reversal of 21010201213 is 31210201012.

It can be written as a sum of positive squares in 4 ways, for example, as 6096174084 + 14914027129 = 78078^2 + 122123^2 .

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 21010201213 - 2²⁵ = 20976646781 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21010201193 and 21010201202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21010201243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21308028 + ... + 21309013.

It is an arithmetic number, because the mean of its divisors is an integer number (2876650335).

Almost surely, 2^21010201213 is an apocalyptic number.

It is an amenable number.

21010201213 is a deficient number, since it is larger than the sum of its proper divisors (2003001467).

21010201213 is a wasteful number, since it uses less digits than its factorization.

21010201213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42617087.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 21010201213 its reverse (31210201012), we get a palindrome (52220402225).

The spelling of 21010201213 in words is "twenty-one billion, ten million, two hundred one thousand, two hundred thirteen".