2221121111112 has 32 divisors (see below), whose sum is σ = 6169780864800. Its totient is φ = 740373703632.

The previous prime is 2221121111081. The next prime is 2221121111113. The reversal of 2221121111112 is 2111111211222.

It is a happy number.

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

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (2221121111113) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5141483838 + ... + 5141484269.

It is an arithmetic number, because the mean of its divisors is an integer number (192805652025).

Almost surely, 2^{2221121111112} is an apocalyptic number.

It is an amenable number.

2221121111112 is an abundant number, since it is smaller than the sum of its proper divisors (3948659753688).

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

2221121111112 is a wasteful number, since it uses less digits than its factorization.

2221121111112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10282968122 (or 10282968112 counting only the distinct ones).

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

Adding to 2221121111112 its reverse (2111111211222), we get a palindrome (4332232322334).

The spelling of 2221121111112 in words is "two trillion, two hundred twenty-one billion, one hundred twenty-one million, one hundred eleven thousand, one hundred twelve".