20201121211120 has 40 divisors (see below), whose sum is σ = 46967848637616. Its totient is φ = 8080406880768.

The previous prime is 20201121211099. The next prime is 20201121211133. The reversal of 20201121211120 is 2111212110202.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×20201121211120² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a junction number, because it is equal to n+sod(n) for n = 20201121211094 and 20201121211103.

It is a congruent number.

It is an unprimeable number.

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, 18482619 + ... + 19545061.

Almost surely, 2^{20201121211120} is an apocalyptic number.

20201121211120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20201121211120 is an abundant number, since it is smaller than the sum of its proper divisors (26766727426496).

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

20201121211120 is a wasteful number, since it uses less digits than its factorization.

20201121211120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1300129 (or 1300123 counting only the distinct ones).

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

Adding to 20201121211120 its reverse (2111212110202), we get a palindrome (22312333321322).

The spelling of 20201121211120 in words is "twenty trillion, two hundred one billion, one hundred twenty-one million, two hundred eleven thousand, one hundred twenty".