10021203212220 has 144 divisors (see below), whose sum is σ = 31232764774848. Its totient is φ = 2598966881280.

The previous prime is 10021203212213. The next prime is 10021203212233. The reversal of 10021203212220 is 2221230212001.

10021203212220 is a `hidden beast` number, since 1 + 0 + 0 + 2 + 120 + 321 + 2 + 220 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 10021203212193 and 10021203212202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 15065712 + ... + 15716808.

Almost surely, 2^{10021203212220} is an apocalyptic number.

10021203212220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 10021203212220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15616382387424).

10021203212220 is an abundant number, since it is smaller than the sum of its proper divisors (21211561562628).

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

10021203212220 is a wasteful number, since it uses less digits than its factorization.

10021203212220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 653460 (or 653455 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 10021203212220 its reverse (2221230212001), we get a palindrome (12242433424221).

The spelling of 10021203212220 in words is "ten trillion, twenty-one billion, two hundred three million, two hundred twelve thousand, two hundred twenty".