103221312011 has 4 divisors (see below), whose sum is σ = 109293153912. Its totient is φ = 97149470112.

The previous prime is 103221311987. The next prime is 103221312049. The reversal of 103221312011 is 110213122301.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 110213122301 = 4139 ⋅26627959.

It is a cyclic number.

It is not a de Polignac number, because 103221312011 - 2¹⁰ = 103221310987 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17), and also a Moran number because the ratio is a prime number: 6071841883 = 103221312011 / (1 + 0 + 3 + 2 + 2 + 1 + 3 + 1 + 2 + 0 + 1 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (103221312811) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3035920925 + ... + 3035920958.

It is an arithmetic number, because the mean of its divisors is an integer number (27323288478).

Almost surely, 2^103221312011 is an apocalyptic number.

103221312011 is a deficient number, since it is larger than the sum of its proper divisors (6071841901).

103221312011 is an equidigital number, since it uses as much as digits as its factorization.

103221312011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6071841900.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 103221312011 its reverse (110213122301), we get a palindrome (213434434312).

The spelling of 103221312011 in words is "one hundred three billion, two hundred twenty-one million, three hundred twelve thousand, eleven".