101220003 has 8 divisors (see below), whose sum is σ = 149955600. Its totient is φ = 67479984.

The previous prime is 101220001. The next prime is 101220013. The reversal of 101220003 is 300022101.

It is a happy number.

It is not a de Polignac number, because 101220003 - 2¹ = 101220001 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (101220001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1874418 + ... + 1874471.

It is an arithmetic number, because the mean of its divisors is an integer number (18744450).

Almost surely, 2^101220003 is an apocalyptic number.

101220003 is a deficient number, since it is larger than the sum of its proper divisors (48735597).

101220003 is an equidigital number, since it uses as much as digits as its factorization.

101220003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3748898 (or 3748892 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

The square root of 101220003 is about 10060.8152254179. The cubic root of 101220003 is about 466.0388428759.

Adding to 101220003 its reverse (300022101), we get a palindrome (401242104).

The spelling of 101220003 in words is "one hundred one million, two hundred twenty thousand, three".