10221101220 has 48 divisors (see below), whose sum is σ = 31220820288. Its totient is φ = 2477842560.

The previous prime is 10221101213. The next prime is 10221101237. The reversal of 10221101220 is 2210112201.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 10221101196 and 10221101205.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 7742599 + ... + 7743918.

It is an arithmetic number, because the mean of its divisors is an integer number (650433756).

Almost surely, 2^10221101220 is an apocalyptic number.

10221101220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10221101220 is an abundant number, since it is smaller than the sum of its proper divisors (20999719068).

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

10221101220 is a wasteful number, since it uses less digits than its factorization.

10221101220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15486540 (or 15486538 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 10221101220 its reverse (2210112201), we get a palindrome (12431213421).

The spelling of 10221101220 in words is "ten billion, two hundred twenty-one million, one hundred one thousand, two hundred twenty".