220021220101 has 2 divisors, whose sum is σ = 220021220102. Its totient is φ = 220021220100.

The previous prime is 220021220051. The next prime is 220021220113. The reversal of 220021220101 is 101022120022.

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., 179776848001 + 40244372100 = 424001^2 + 200610^2 .

It is a cyclic number.

It is not a de Polignac number, because 220021220101 - 2⁷ = 220021219973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220021220171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110010610050 + 110010610051.

It is an arithmetic number, because the mean of its divisors is an integer number (110010610051).

Almost surely, 2^220021220101 is an apocalyptic number.

It is an amenable number.

220021220101 is a deficient number, since it is larger than the sum of its proper divisors (1).

220021220101 is an equidigital number, since it uses as much as digits as its factorization.

220021220101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 220021220101 its reverse (101022120022), we get a palindrome (321043340123).

The spelling of 220021220101 in words is "two hundred twenty billion, twenty-one million, two hundred twenty thousand, one hundred one".