101985220 has 24 divisors (see below), whose sum is σ = 223481664. Its totient is φ = 39020256.

The previous prime is 101985211. The next prime is 101985223. The reversal of 101985220 is 22589101.

It is not an unprimeable number, because it can be changed into a prime (101985223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 110394 + ... + 111313.

It is an arithmetic number, because the mean of its divisors is an integer number (9311736).

Almost surely, 2^101985220 is an apocalyptic number.

101985220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

101985220 is an abundant number, since it is smaller than the sum of its proper divisors (121496444).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

101985220 is a wasteful number, since it uses less digits than its factorization.

101985220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221739 (or 221737 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 28.

The square root of 101985220 is about 10098.7731928190. The cubic root of 101985220 is about 467.2103040923.

The spelling of 101985220 in words is "one hundred one million, nine hundred eighty-five thousand, two hundred twenty".