2121403315020 has 192 divisors, whose sum is σ = 6763479561216. Its totient is φ = 491787141120.

The previous prime is 2121403314971. The next prime is 2121403315039. The reversal of 2121403315020 is 205133041212.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 63390132 + ... + 63423588.

It is an arithmetic number, because the mean of its divisors is an integer number (35226456048).

Almost surely, 2^{2121403315020} is an apocalyptic number.

2121403315020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2121403315020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3381739780608).

2121403315020 is an abundant number, since it is smaller than the sum of its proper divisors (4642076246196).

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

2121403315020 is a wasteful number, since it uses less digits than its factorization.

2121403315020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37680 (or 37678 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

Adding to 2121403315020 its reverse (205133041212), we get a palindrome (2326536356232).

The spelling of 2121403315020 in words is "two trillion, one hundred twenty-one billion, four hundred three million, three hundred fifteen thousand, twenty".