103640212691 has 4 divisors (see below), whose sum is σ = 104104967232. Its totient is φ = 103175458152.

The previous prime is 103640212681. The next prime is 103640212721. The reversal of 103640212691 is 196212046301.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 196212046301 = 347 ⋅565452583.

It is a cyclic number.

It is not a de Polignac number, because 103640212691 - 2¹⁴ = 103640196307 is a prime.

It is a super-3 number, since 3×103640212691³ (a number of 34 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (103640212681) 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, 232376936 + ... + 232377381.

It is an arithmetic number, because the mean of its divisors is an integer number (26026241808).

Almost surely, 2^103640212691 is an apocalyptic number.

103640212691 is a deficient number, since it is larger than the sum of its proper divisors (464754541).

103640212691 is an equidigital number, since it uses as much as digits as its factorization.

103640212691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 464754540.

The product of its (nonzero) digits is 15552, while the sum is 35.

Adding to 103640212691 its reverse (196212046301), we get a palindrome (299852258992).

The spelling of 103640212691 in words is "one hundred three billion, six hundred forty million, two hundred twelve thousand, six hundred ninety-one".