101201989 has 16 divisors (see below), whose sum is σ = 118920960. Its totient is φ = 84332160.

The previous prime is 101201953. The next prime is 101202019. The reversal of 101201989 is 989102101.

It is a cyclic number.

It is not a de Polignac number, because 101201989 - 2¹⁵ = 101169221 is a prime.

It is a super-2 number, since 2×101201989² = 20483685155112242, which contains 22 as substring.

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 101201989.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101201939) 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, 36672 + ... + 39334.

It is an arithmetic number, because the mean of its divisors is an integer number (7432560).

Almost surely, 2^101201989 is an apocalyptic number.

It is an amenable number.

101201989 is a deficient number, since it is larger than the sum of its proper divisors (17718971).

101201989 is an equidigital number, since it uses as much as digits as its factorization.

101201989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2820.

The product of its (nonzero) digits is 1296, while the sum is 31.

The square root of 101201989 is about 10059.9199300988. The cubic root of 101201989 is about 466.0111944482.

The spelling of 101201989 in words is "one hundred one million, two hundred one thousand, nine hundred eighty-nine".