101220020221 has 8 divisors (see below), whose sum is σ = 103752210744. Its totient is φ = 98690849280.

The previous prime is 101220020219. The next prime is 101220020227. The reversal of 101220020221 is 122020022101.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 7099916121 + 94120104100 = 84261^2 + 306790^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 101220020221 - 2¹ = 101220020219 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101220020227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 686940 + ... + 821173.

It is an arithmetic number, because the mean of its divisors is an integer number (12969026343).

Almost surely, 2^101220020221 is an apocalyptic number.

It is an amenable number.

101220020221 is a deficient number, since it is larger than the sum of its proper divisors (2532190523).

101220020221 is a wasteful number, since it uses less digits than its factorization.

101220020221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1509791.

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

Adding to 101220020221 its reverse (122020022101), we get a palindrome (223240042322).

The spelling of 101220020221 in words is "one hundred one billion, two hundred twenty million, twenty thousand, two hundred twenty-one".