103100921 has 16 divisors (see below), whose sum is σ = 128768640. Its totient is φ = 80196480.

The previous prime is 103100917. The next prime is 103100941. The reversal of 103100921 is 129001301.

It is a happy number.

It is not a de Polignac number, because 103100921 - 2² = 103100917 is a prime.

It is a super-2 number, since 2×103100921² = 21259599822096482, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 103100921.

It is not an unprimeable number, because it can be changed into a prime (103100911) 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, 71435 + ... + 72863.

It is an arithmetic number, because the mean of its divisors is an integer number (8048040).

Almost surely, 2^103100921 is an apocalyptic number.

103100921 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

103100921 is a deficient number, since it is larger than the sum of its proper divisors (25667719).

103100921 is a wasteful number, since it uses less digits than its factorization.

103100921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2384.

The product of its (nonzero) digits is 54, while the sum is 17.

The square root of 103100921 is about 10153.8623685768. The cubic root of 103100921 is about 468.9078625398.

The spelling of 103100921 in words is "one hundred three million, one hundred thousand, nine hundred twenty-one".