10111101020221 has 2 divisors, whose sum is σ = 10111101020222. Its totient is φ = 10111101020220.

The previous prime is 10111101020183. The next prime is 10111101020243. The reversal of 10111101020221 is 12202010111101.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10093716597721 + 17384422500 = 3177061^2 + 131850^2 .

It is a cyclic number.

It is not a de Polignac number, because 10111101020221 - 2²⁵ = 10111067465789 is a prime.

It is a super-2 number, since 2×10111101020221² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10111101020521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5055550510110 + 5055550510111.

It is an arithmetic number, because the mean of its divisors is an integer number (5055550510111).

Almost surely, 2^{10111101020221} is an apocalyptic number.

It is an amenable number.

10111101020221 is a deficient number, since it is larger than the sum of its proper divisors (1).

10111101020221 is an equidigital number, since it uses as much as digits as its factorization.

10111101020221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 10111101020221 its reverse (12202010111101), we get a palindrome (22313111131322).

The spelling of 10111101020221 in words is "ten trillion, one hundred eleven billion, one hundred one million, twenty thousand, two hundred twenty-one".