1010211221020 has 12 divisors (see below), whose sum is σ = 2121443564184. Its totient is φ = 404084488400.

The previous prime is 1010211221017. The next prime is 1010211221051. The reversal of 1010211221020 is 201221120101.

It is a super-2 number, since 2×1010211221020² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25255280506 + ... + 25255280545.

It is an arithmetic number, because the mean of its divisors is an integer number (176786963682).

Almost surely, 2^{1010211221020} is an apocalyptic number.

1010211221020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1010211221020 is an abundant number, since it is smaller than the sum of its proper divisors (1111232343164).

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

1010211221020 is a wasteful number, since it uses less digits than its factorization.

1010211221020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50510561060 (or 50510561058 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 1010211221020 its reverse (201221120101), we get a palindrome (1211432341121).

The spelling of 1010211221020 in words is "one trillion, ten billion, two hundred eleven million, two hundred twenty-one thousand, twenty".