103121661 has 8 divisors (see below), whose sum is σ = 137985984. Its totient is φ = 68502560.

The previous prime is 103121647. The next prime is 103121687. The reversal of 103121661 is 166121301.

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 103121661 - 2⁷ = 103121533 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (103121621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60321 + ... + 62006.

It is an arithmetic number, because the mean of its divisors is an integer number (17248248).

Almost surely, 2^103121661 is an apocalyptic number.

It is an amenable number.

103121661 is a deficient number, since it is larger than the sum of its proper divisors (34864323).

103121661 is a wasteful number, since it uses less digits than its factorization.

103121661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122611.

The product of its (nonzero) digits is 216, while the sum is 21.

The square root of 103121661 is about 10154.8836034688. The cubic root of 103121661 is about 468.9393025985.

Adding to 103121661 its reverse (166121301), we get a palindrome (269242962).

The spelling of 103121661 in words is "one hundred three million, one hundred twenty-one thousand, six hundred sixty-one".