10001021220220 has 48 divisors (see below), whose sum is σ = 21067356040416. Its totient is φ = 3987989280000.

The previous prime is 10001021220199. The next prime is 10001021220257. The reversal of 10001021220220 is 2202212010001.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 10001021220220.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 88525770 + ... + 88638670.

It is an arithmetic number, because the mean of its divisors is an integer number (438903250842).

Almost surely, 2^{10001021220220} is an apocalyptic number.

10001021220220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10001021220220 is an abundant number, since it is smaller than the sum of its proper divisors (11066334820196).

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

10001021220220 is a wasteful number, since it uses less digits than its factorization.

10001021220220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126622 (or 126620 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 10001021220220 its reverse (2202212010001), we get a palindrome (12203233230221).

The spelling of 10001021220220 in words is "ten trillion, one billion, twenty-one million, two hundred twenty thousand, two hundred twenty".