1210221010020 has 192 divisors, whose sum is σ = 3820623593472. Its totient is φ = 283573056000.

The previous prime is 1210221009997. The next prime is 1210221010021. The reversal of 1210221010020 is 200101220121.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 1210221009978 and 1210221010005.

It is not an unprimeable number, because it can be changed into a prime (1210221010021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 16761637 + ... + 16833683.

It is an arithmetic number, because the mean of its divisors is an integer number (19899081216).

Almost surely, 2^{1210221010020} is an apocalyptic number.

1210221010020 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 1210221010020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1910311796736).

1210221010020 is an abundant number, since it is smaller than the sum of its proper divisors (2610402583452).

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

1210221010020 is a wasteful number, since it uses less digits than its factorization.

1210221010020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72922 (or 72920 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 1210221010020 its reverse (200101220121), we get a palindrome (1410322230141).

The spelling of 1210221010020 in words is "one trillion, two hundred ten billion, two hundred twenty-one million, ten thousand, twenty".