10102011221 has 2 divisors, whose sum is σ = 10102011222. Its totient is φ = 10102011220.

The previous prime is 10102011193. The next prime is 10102011233. The reversal of 10102011221 is 12211020101.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7227550225 + 2874460996 = 85015^2 + 53614^2 .

It is a cyclic number.

It is not a de Polignac number, because 10102011221 - 2¹⁰ = 10102010197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10102031221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5051005610 + 5051005611.

It is an arithmetic number, because the mean of its divisors is an integer number (5051005611).

Almost surely, 2^10102011221 is an apocalyptic number.

It is an amenable number.

10102011221 is a deficient number, since it is larger than the sum of its proper divisors (1).

10102011221 is an equidigital number, since it uses as much as digits as its factorization.

10102011221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 10102011221 its reverse (12211020101), we get a palindrome (22313031322).

The spelling of 10102011221 in words is "ten billion, one hundred two million, eleven thousand, two hundred twenty-one".