1021012221120 has 224 divisors, whose sum is σ = 3254106735360. Its totient is φ = 271230996480.

The previous prime is 1021012221107. The next prime is 1021012221167. The reversal of 1021012221120 is 211222101201.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 1021012221120.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 479122455 + ... + 479124585.

Almost surely, 2^{1021012221120} is an apocalyptic number.

1021012221120 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 1021012221120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1627053367680).

1021012221120 is an abundant number, since it is smaller than the sum of its proper divisors (2233094514240).

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

1021012221120 is a wasteful number, since it uses less digits than its factorization.

1021012221120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3823 (or 3813 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 1021012221120 its reverse (211222101201), we get a palindrome (1232234322321).

The spelling of 1021012221120 in words is "one trillion, twenty-one billion, twelve million, two hundred twenty-one thousand, one hundred twenty".