101221103220 has 48 divisors (see below), whose sum is σ = 284902990848. Its totient is φ = 26850970240.

The previous prime is 101221103219. The next prime is 101221103251. The reversal of 101221103220 is 22301122101.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 101221103220.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4404819 + ... + 4427738.

It is an arithmetic number, because the mean of its divisors is an integer number (5935478976).

Almost surely, 2^101221103220 is an apocalyptic number.

101221103220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

101221103220 is an abundant number, since it is smaller than the sum of its proper divisors (183681887628).

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

101221103220 is a wasteful number, since it uses less digits than its factorization.

101221103220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8832760 (or 8832758 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 101221103220 its reverse (22301122101), we get a palindrome (123522225321).

The spelling of 101221103220 in words is "one hundred one billion, two hundred twenty-one million, one hundred three thousand, two hundred twenty".