101321989 has 16 divisors (see below), whose sum is σ = 110267136. Its totient is φ = 92736000.

The previous prime is 101321959. The next prime is 101322019. The reversal of 101321989 is 989123101.

It is an interprime number because it is at equal distance from previous prime (101321959) and next prime (101322019).

It is a cyclic number.

It is not a de Polignac number, because 101321989 - 2⁹ = 101321477 is a prime.

It is a super-2 number, since 2×101321989² = 20532290909832242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101321929) 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, 168289 + ... + 168889.

It is an arithmetic number, because the mean of its divisors is an integer number (6891696).

Almost surely, 2^101321989 is an apocalyptic number.

It is an amenable number.

101321989 is a deficient number, since it is larger than the sum of its proper divisors (8945147).

101321989 is a wasteful number, since it uses less digits than its factorization.

101321989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 876.

The product of its (nonzero) digits is 3888, while the sum is 34.

The square root of 101321989 is about 10065.8824253018. The cubic root of 101321989 is about 466.1953122229.

It can be divided in two parts, 10132 and 1989, that added together give a palindrome (12121).

The spelling of 101321989 in words is "one hundred one million, three hundred twenty-one thousand, nine hundred eighty-nine".