101221102220 has 36 divisors (see below), whose sum is σ = 247268694960. Its totient is φ = 34704377568.

The previous prime is 101221102181. The next prime is 101221102243. The reversal of 101221102220 is 22201122101.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a junction number, because it is equal to n+sod(n) for n = 101221102195 and 101221102204.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 51642440 + ... + 51644399.

It is an arithmetic number, because the mean of its divisors is an integer number (6868574860).

Almost surely, 2^101221102220 is an apocalyptic number.

101221102220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

101221102220 is an abundant number, since it is smaller than the sum of its proper divisors (146047592740).

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

101221102220 is a wasteful number, since it uses less digits than its factorization.

101221102220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103286862 (or 103286853 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 101221102220 its reverse (22201122101), we get a palindrome (123422224321).

The spelling of 101221102220 in words is "one hundred one billion, two hundred twenty-one million, one hundred two thousand, two hundred twenty".