2121112011020 has 96 divisors (see below), whose sum is σ = 4599024454080. Its totient is φ = 821369369600.

The previous prime is 2121112011001. The next prime is 2121112011043. The reversal of 2121112011020 is 201102111212.

It is a junction number, because it is equal to n+sod(n) for n = 2121112010986 and 2121112011004.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 31334771 + ... + 31402389.

It is an arithmetic number, because the mean of its divisors is an integer number (47906504730).

Almost surely, 2^{2121112011020} is an apocalyptic number.

2121112011020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2121112011020 is an abundant number, since it is smaller than the sum of its proper divisors (2477912443060).

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

2121112011020 is a wasteful number, since it uses less digits than its factorization.

2121112011020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68075 (or 68073 counting only the distinct ones).

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

Adding to 2121112011020 its reverse (201102111212), we get a palindrome (2322214122232).

The spelling of 2121112011020 in words is "two trillion, one hundred twenty-one billion, one hundred twelve million, eleven thousand, twenty".