2121043023020 has 48 divisors (see below), whose sum is σ = 4475202994080. Its totient is φ = 844417890816.

The previous prime is 2121043022993. The next prime is 2121043023059. The reversal of 2121043023020 is 203203401212.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 2121043022983 and 2121043023001.

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, 11037479 + ... + 11228001.

It is an arithmetic number, because the mean of its divisors is an integer number (93233395710).

Almost surely, 2^{2121043023020} is an apocalyptic number.

2121043023020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2121043023020 is an abundant number, since it is smaller than the sum of its proper divisors (2354159971060).

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

2121043023020 is a wasteful number, since it uses less digits than its factorization.

2121043023020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193154 (or 193152 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 2121043023020 its reverse (203203401212), we get a palindrome (2324246424232).

The spelling of 2121043023020 in words is "two trillion, one hundred twenty-one billion, forty-three million, twenty-three thousand, twenty".