111121222010020 has 12 divisors (see below), whose sum is σ = 233354566221084. Its totient is φ = 44448488804000.

The previous prime is 111121222009997. The next prime is 111121222010021. The reversal of 111121222010020 is 20010222121111.

It can be written as a sum of positive squares in 2 ways, for example, as 82281916199844 + 28839305810176 = 9070938^2 + 5370224^2 .

It is a junction number, because it is equal to n+sod(n) for n = 111121222009976 and 111121222010003.

It is not an unprimeable number, because it can be changed into a prime (111121222010021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2778030550231 + ... + 2778030550270.

It is an arithmetic number, because the mean of its divisors is an integer number (19446213851757).

Almost surely, 2^{111121222010020} is an apocalyptic number.

111121222010020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111121222010020 is an abundant number, since it is smaller than the sum of its proper divisors (122233344211064).

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

111121222010020 is a wasteful number, since it uses less digits than its factorization.

111121222010020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5556061100510 (or 5556061100508 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 111121222010020 its reverse (20010222121111), we get a palindrome (131131444131131).

The spelling of 111121222010020 in words is "one hundred eleven trillion, one hundred twenty-one billion, two hundred twenty-two million, ten thousand, twenty".