10211221210220 has 48 divisors (see below), whose sum is σ = 21843640980000. Its totient is φ = 4008581713920.

The previous prime is 10211221210193. The next prime is 10211221210241. The reversal of 10211221210220 is 2201212211201.

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, 8772770 + ... + 9868329.

It is an arithmetic number, because the mean of its divisors is an integer number (455075853750).

Almost surely, 2^{10211221210220} is an apocalyptic number.

10211221210220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10211221210220 is an abundant number, since it is smaller than the sum of its proper divisors (11632419769780).

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

10211221210220 is a wasteful number, since it uses less digits than its factorization.

10211221210220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18641618 (or 18641616 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 10211221210220 its reverse (2201212211201), we get a palindrome (12412433421421).

The spelling of 10211221210220 in words is "ten trillion, two hundred eleven billion, two hundred twenty-one million, two hundred ten thousand, two hundred twenty".