103221220021 has 8 divisors (see below), whose sum is σ = 104476259160. Its totient is φ = 101968297728.

The previous prime is 103221220009. The next prime is 103221220049. The reversal of 103221220021 is 120022122301.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 107019025 + 103114200996 = 10345^2 + 321114^2 .

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 103221220021 - 2⁹ = 103221219509 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 103221219977 and 103221220004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (103221220621) 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 in 7 ways as a sum of consecutive naturals, for example, 430986 + ... + 626251.

It is an arithmetic number, because the mean of its divisors is an integer number (13059532395).

Almost surely, 2^103221220021 is an apocalyptic number.

It is an amenable number.

103221220021 is a deficient number, since it is larger than the sum of its proper divisors (1255039139).

103221220021 is a wasteful number, since it uses less digits than its factorization.

103221220021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1058423.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 103221220021 its reverse (120022122301), we get a palindrome (223243342322).

The spelling of 103221220021 in words is "one hundred three billion, two hundred twenty-one million, two hundred twenty thousand, twenty-one".