20121121112020 has 48 divisors (see below), whose sum is σ = 42670038273408. Its totient is φ = 7969343863680.

The previous prime is 20121121112003. The next prime is 20121121112089. The reversal of 20121121112020 is 2021112112102.

It is a super-2 number, since 2×20121121112020² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20121121111985 and 20121121112003.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2103505 + ... + 6683335.

It is an arithmetic number, because the mean of its divisors is an integer number (888959130696).

Almost surely, 2^{20121121112020} is an apocalyptic number.

20121121112020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20121121112020 is an abundant number, since it is smaller than the sum of its proper divisors (22548917161388).

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

20121121112020 is a wasteful number, since it uses less digits than its factorization.

20121121112020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4582000 (or 4581998 counting only the distinct ones).

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

Adding to 20121121112020 its reverse (2021112112102), we get a palindrome (22142233224122).

The spelling of 20121121112020 in words is "twenty trillion, one hundred twenty-one billion, one hundred twenty-one million, one hundred twelve thousand, twenty".