20021121101122 has 16 divisors (see below), whose sum is σ = 30150148830840. Its totient is φ = 9971075657728.

The previous prime is 20021121101119. The next prime is 20021121101129. The reversal of 20021121101122 is 22110112112002.

It can be written as a sum of positive squares in 4 ways, for example, as 19970432631241 + 50688469881 = 4468829^2 + 225141^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20021121101096 and 20021121101105.

It is not an unprimeable number, because it can be changed into a prime (20021121101129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8666508 + ... + 10730824.

Almost surely, 2^{20021121101122} is an apocalyptic number.

20021121101122 is a deficient number, since it is larger than the sum of its proper divisors (10129027729718).

20021121101122 is a wasteful number, since it uses less digits than its factorization.

20021121101122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2083445.

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

Adding to 20021121101122 its reverse (22110112112002), we get a palindrome (42131233213124).

The spelling of 20021121101122 in words is "twenty trillion, twenty-one billion, one hundred twenty-one million, one hundred one thousand, one hundred twenty-two".