11021221121112 has 128 divisors (see below), whose sum is σ = 30679661376000. Its totient is φ = 3665927548800.

The previous prime is 11021221121047. The next prime is 11021221121123. The reversal of 11021221121112 is 21112112212011.

It is a happy number.

11021221121112 is a `hidden beast` number, since 110 + 212 + 211 + 21 + 112 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

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, 274474237 + ... + 274514387.

It is an arithmetic number, because the mean of its divisors is an integer number (239684854500).

Almost surely, 2^{11021221121112} is an apocalyptic number.

11021221121112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

11021221121112 is an abundant number, since it is smaller than the sum of its proper divisors (19658440254888).

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

11021221121112 is a wasteful number, since it uses less digits than its factorization.

11021221121112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42838 (or 42828 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 11021221121112 its reverse (21112112212011), we get a palindrome (32133333333123).

The spelling of 11021221121112 in words is "eleven trillion, twenty-one billion, two hundred twenty-one million, one hundred twenty-one thousand, one hundred twelve".