1021220202112 has 128 divisors (see below), whose sum is σ = 2307858609600. Its totient is φ = 445858775040.

The previous prime is 1021220202109. The next prime is 1021220202127. The reversal of 1021220202112 is 2112020221201.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (16).

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, 7815783 + ... + 7945369.

Almost surely, 2^{1021220202112} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1021220202112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1153929304800).

1021220202112 is an abundant number, since it is smaller than the sum of its proper divisors (1286638407488).

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

1021220202112 is a wasteful number, since it uses less digits than its factorization.

1021220202112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129834 (or 129822 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 1021220202112 its reverse (2112020221201), we get a palindrome (3133240423313).

The spelling of 1021220202112 in words is "one trillion, twenty-one billion, two hundred twenty million, two hundred two thousand, one hundred twelve".