221020102020101 has 2 divisors, whose sum is σ = 221020102020102. Its totient is φ = 221020102020100.

The previous prime is 221020102019939. The next prime is 221020102020119. The reversal of 221020102020101 is 101020201020122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 175764222912100 + 45255879108001 = 13257610^2 + 6727249^2 .

It is a cyclic number.

It is not a de Polignac number, because 221020102020101 - 2²⁶ = 221020034911237 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221020102020181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110510051010050 + 110510051010051.

It is an arithmetic number, because the mean of its divisors is an integer number (110510051010051).

Almost surely, 2^{221020102020101} is an apocalyptic number.

It is an amenable number.

221020102020101 is a deficient number, since it is larger than the sum of its proper divisors (1).

221020102020101 is an equidigital number, since it uses as much as digits as its factorization.

221020102020101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 221020102020101 its reverse (101020201020122), we get a palindrome (322040303040223).

The spelling of 221020102020101 in words is "two hundred twenty-one trillion, twenty billion, one hundred two million, twenty thousand, one hundred one".