221012211020101 has 2 divisors, whose sum is σ = 221012211020102. Its totient is φ = 221012211020100.

The previous prime is 221012211020089. The next prime is 221012211020131. The reversal of 221012211020101 is 101020112210122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 112113176899201 + 108899034120900 = 10588351^2 + 10435470^2 .

It is a cyclic number.

It is not a de Polignac number, because 221012211020101 - 2¹³ = 221012211011909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221012211020131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110506105510050 + 110506105510051.

It is an arithmetic number, because the mean of its divisors is an integer number (110506105510051).

Almost surely, 2^{221012211020101} is an apocalyptic number.

It is an amenable number.

221012211020101 is a deficient number, since it is larger than the sum of its proper divisors (1).

221012211020101 is an equidigital number, since it uses as much as digits as its factorization.

221012211020101 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 16.

Adding to 221012211020101 its reverse (101020112210122), we get a palindrome (322032323230223).

The spelling of 221012211020101 in words is "two hundred twenty-one trillion, twelve billion, two hundred eleven million, twenty thousand, one hundred one".