20121021110122 has 16 divisors (see below), whose sum is σ = 32736352855752. Its totient is φ = 9237771527680.

The previous prime is 20121021110111. The next prime is 20121021110129. The reversal of 20121021110122 is 22101112012102.

It can be written as a sum of positive squares in 4 ways, for example, as 11178116270161 + 8942904839961 = 3343369^2 + 2990469^2 .

It is a super-2 number, since 2×20121021110122² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20121021110096 and 20121021110105.

It is not an unprimeable number, because it can be changed into a prime (20121021110129) 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, 7217007613 + ... + 7217010400.

Almost surely, 2^{20121021110122} is an apocalyptic number.

20121021110122 is a deficient number, since it is larger than the sum of its proper divisors (12615331745630).

20121021110122 is a wasteful number, since it uses less digits than its factorization.

20121021110122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14434018073.

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

Adding to 20121021110122 its reverse (22101112012102), we get a palindrome (42222133122224).

The spelling of 20121021110122 in words is "twenty trillion, one hundred twenty-one billion, twenty-one million, one hundred ten thousand, one hundred twenty-two".