10221210021220 has 96 divisors (see below), whose sum is σ = 24035373637632. Its totient is φ = 3619675200000.

The previous prime is 10221210021179. The next prime is 10221210021229. The reversal of 10221210021220 is 2212001212201.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 10221210021194 and 10221210021203.

It is not an unprimeable number, because it can be changed into a prime (10221210021229) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2415076 + ... + 5125915.

It is an arithmetic number, because the mean of its divisors is an integer number (250368475392).

Almost surely, 2^{10221210021220} is an apocalyptic number.

10221210021220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10221210021220 is an abundant number, since it is smaller than the sum of its proper divisors (13814163616412).

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

10221210021220 is a wasteful number, since it uses less digits than its factorization.

10221210021220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7541173 (or 7541171 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 10221210021220 its reverse (2212001212201), we get a palindrome (12433211233421).

The spelling of 10221210021220 in words is "ten trillion, two hundred twenty-one billion, two hundred ten million, twenty-one thousand, two hundred twenty".