21210011001213 has 64 divisors (see below), whose sum is σ = 30498757873920. Its totient is φ = 13085872128000.

The previous prime is 21210011001203. The next prime is 21210011001251. The reversal of 21210011001213 is 31210011001212.

It is not a de Polignac number, because 21210011001213 - 2⁹ = 21210011000701 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21210011001192 and 21210011001201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21210011001203) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 47178138 + ... + 47625588.

It is an arithmetic number, because the mean of its divisors is an integer number (476543091780).

Almost surely, 2^{21210011001213} is an apocalyptic number.

It is an amenable number.

21210011001213 is a deficient number, since it is larger than the sum of its proper divisors (9288746872707).

21210011001213 is a wasteful number, since it uses less digits than its factorization.

21210011001213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 447758.

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 21210011001213 its reverse (31210011001212), we get a palindrome (52420022002425).

Subtracting 21210011001213 from its reverse (31210011001212), we obtain a palindrome (9999999999999).

The spelling of 21210011001213 in words is "twenty-one trillion, two hundred ten billion, eleven million, one thousand, two hundred thirteen".