1021210011220 has 96 divisors (see below), whose sum is σ = 2483662890240. Its totient is φ = 345471160320.

The previous prime is 1021210011191. The next prime is 1021210011223. The reversal of 1021210011220 is 221100121201.

1021210011220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 1021210011220.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021210011223) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4381386 + ... + 4608574.

It is an arithmetic number, because the mean of its divisors is an integer number (25871488440).

Almost surely, 2^{1021210011220} is an apocalyptic number.

1021210011220 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 1021210011220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1241831445120).

1021210011220 is an abundant number, since it is smaller than the sum of its proper divisors (1462452879020).

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

1021210011220 is a wasteful number, since it uses less digits than its factorization.

1021210011220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227633 (or 227631 counting only the distinct ones).

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

Adding to 1021210011220 its reverse (221100121201), we get a palindrome (1242310132421).

The spelling of 1021210011220 in words is "one trillion, twenty-one billion, two hundred ten million, eleven thousand, two hundred twenty".