20021110121120 has 24 divisors (see below), whose sum is σ = 47299872661524. Its totient is φ = 8008444048384.

The previous prime is 20021110121093. The next prime is 20021110121123. The reversal of 20021110121120 is 2112101112002.

It can be written as a sum of positive squares in 2 ways, for example, as 19948121534224 + 72988586896 = 4466332^2 + 270164^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20021110121095 and 20021110121104.

It is not an unprimeable number, because it can be changed into a prime (20021110121123) 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, 62565968969 + ... + 62565969288.

Almost surely, 2^{20021110121120} is an apocalyptic number.

20021110121120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20021110121120 is an abundant number, since it is smaller than the sum of its proper divisors (27278762540404).

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

20021110121120 is a wasteful number, since it uses less digits than its factorization.

20021110121120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125131938272 (or 125131938264 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 20021110121120 its reverse (2112101112002), we get a palindrome (22133211233122).

The spelling of 20021110121120 in words is "twenty trillion, twenty-one billion, one hundred ten million, one hundred twenty-one thousand, one hundred twenty".