21200000101213 has 2 divisors, whose sum is σ = 21200000101214. Its totient is φ = 21200000101212.

The previous prime is 21200000101141. The next prime is 21200000101271. The reversal of 21200000101213 is 31210100000212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13409973013369 + 7790027087844 = 3661963^2 + 2791062^2 .

It is a cyclic number.

It is not a de Polignac number, because 21200000101213 - 2³⁷ = 21062561147741 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21200000101193 and 21200000101202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21200000101013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10600000050606 + 10600000050607.

It is an arithmetic number, because the mean of its divisors is an integer number (10600000050607).

Almost surely, 2^{21200000101213} is an apocalyptic number.

It is an amenable number.

21200000101213 is a deficient number, since it is larger than the sum of its proper divisors (1).

21200000101213 is an equidigital number, since it uses as much as digits as its factorization.

21200000101213 is an odious number, because the sum of its binary digits is odd.

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

Adding to 21200000101213 its reverse (31210100000212), we get a palindrome (52410100101425).

The spelling of 21200000101213 in words is "twenty-one trillion, two hundred billion, one hundred one thousand, two hundred thirteen".