101221220226 has 32 divisors (see below), whose sum is σ = 235155627648. Its totient is φ = 28446243840.

The previous prime is 101221220213. The next prime is 101221220267. The reversal of 101221220226 is 622022122101.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19751775 + ... + 19756898.

It is an arithmetic number, because the mean of its divisors is an integer number (7348613364).

Almost surely, 2^101221220226 is an apocalyptic number.

101221220226 is an abundant number, since it is smaller than the sum of its proper divisors (133934407422).

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

101221220226 is a wasteful number, since it uses less digits than its factorization.

101221220226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39508746.

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 101221220226 its reverse (622022122101), we get a palindrome (723243342327).

The spelling of 101221220226 in words is "one hundred one billion, two hundred twenty-one million, two hundred twenty thousand, two hundred twenty-six".