103031021221 has 16 divisors (see below), whose sum is σ = 104775770880. Its totient is φ = 101302891200.

The previous prime is 103031021207. The next prime is 103031021227. The reversal of 103031021221 is 122120130301.

It is a cyclic number.

It is not a de Polignac number, because 103031021221 - 2¹¹ = 103031019173 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 103031021195 and 103031021204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (103031021227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8998126 + ... + 9009568.

It is an arithmetic number, because the mean of its divisors is an integer number (6548485680).

Almost surely, 2^103031021221 is an apocalyptic number.

It is an amenable number.

103031021221 is a deficient number, since it is larger than the sum of its proper divisors (1744749659).

103031021221 is a wasteful number, since it uses less digits than its factorization.

103031021221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12156.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 103031021221 its reverse (122120130301), we get a palindrome (225151151522).

The spelling of 103031021221 in words is "one hundred three billion, thirty-one million, twenty-one thousand, two hundred twenty-one".