101121845 has 32 divisors (see below), whose sum is σ = 138018816. Its totient is φ = 70459200.

The previous prime is 101121833. The next prime is 101121847. The reversal of 101121845 is 548121101.

It is not a de Polignac number, because 101121845 - 2⁴ = 101121829 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 101121845.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101121847) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 216302 + ... + 216768.

It is an arithmetic number, because the mean of its divisors is an integer number (4313088).

Almost surely, 2^101121845 is an apocalyptic number.

It is an amenable number.

101121845 is a deficient number, since it is larger than the sum of its proper divisors (36896971).

101121845 is a wasteful number, since it uses less digits than its factorization.

101121845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 641.

The product of its (nonzero) digits is 320, while the sum is 23.

The square root of 101121845 is about 10055.9358092621. The cubic root of 101121845 is about 465.8881472474. Note that the first 3 decimals are identical.

Adding to 101121845 its reverse (548121101), we get a palindrome (649242946).

The spelling of 101121845 in words is "one hundred one million, one hundred twenty-one thousand, eight hundred forty-five".