103212661 has 16 divisors (see below), whose sum is σ = 114480000. Its totient is φ = 92731584.

The previous prime is 103212623. The next prime is 103212701. The reversal of 103212661 is 166212301.

It is not a de Polignac number, because 103212661 - 2¹³ = 103204469 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 (103213661) 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, 206590 + ... + 207088.

It is an arithmetic number, because the mean of its divisors is an integer number (7155000).

Almost surely, 2^103212661 is an apocalyptic number.

It is an amenable number.

103212661 is a deficient number, since it is larger than the sum of its proper divisors (11267339).

103212661 is an frugal number, since it uses more digits than its factorization.

103212661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 585 (or 539 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 103212661 is about 10159.3632182337. The cubic root of 103212661 is about 469.0772009793.

Adding to 103212661 its reverse (166212301), we get a palindrome (269424962).

The spelling of 103212661 in words is "one hundred three million, two hundred twelve thousand, six hundred sixty-one".