101221022220 has 96 divisors (see below), whose sum is σ = 295091487936. Its totient is φ = 25902182400.

The previous prime is 101221022191. The next prime is 101221022263. The reversal of 101221022220 is 22220122101.

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 101221022220.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 187209 + ... + 487328.

It is an arithmetic number, because the mean of its divisors is an integer number (3073869666).

Almost surely, 2^101221022220 is an apocalyptic number.

101221022220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

101221022220 is an abundant number, since it is smaller than the sum of its proper divisors (193870465716).

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

101221022220 is a wasteful number, since it uses less digits than its factorization.

101221022220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 674651 (or 674649 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 101221022220 its reverse (22220122101), we get a palindrome (123441144321).

The spelling of 101221022220 in words is "one hundred one billion, two hundred twenty-one million, twenty-two thousand, two hundred twenty".