21221201021203 has 2 divisors, whose sum is σ = 21221201021204. Its totient is φ = 21221201021202.

The previous prime is 21221201021183. The next prime is 21221201021213. The reversal of 21221201021203 is 30212010212212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21221201021203 - 2¹³ = 21221201013011 is a prime.

It is not a weakly prime, because it can be changed into another prime (21221201021213) 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 as a sum of consecutive naturals, namely, 10610600510601 + 10610600510602.

It is an arithmetic number, because the mean of its divisors is an integer number (10610600510602).

Almost surely, 2^{21221201021203} is an apocalyptic number.

21221201021203 is a deficient number, since it is larger than the sum of its proper divisors (1).

21221201021203 is an equidigital number, since it uses as much as digits as its factorization.

21221201021203 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 21221201021203 its reverse (30212010212212), we get a palindrome (51433211233415).

The spelling of 21221201021203 in words is "twenty-one trillion, two hundred twenty-one billion, two hundred one million, twenty-one thousand, two hundred three".