2121321020010 has 128 divisors (see below), whose sum is σ = 5290218086400. Its totient is φ = 543747697920.

The previous prime is 2121321019949. The next prime is 2121321020029. The reversal of 2121321020010 is 100201231212.

It is a Harshad number since it is a multiple of its sum of digits (15).

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, 239991171 + ... + 240000009.

It is an arithmetic number, because the mean of its divisors is an integer number (41329828800).

Almost surely, 2^{2121321020010} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2121321020010, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2645109043200).

2121321020010 is an abundant number, since it is smaller than the sum of its proper divisors (3168897066390).

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

2121321020010 is a wasteful number, since it uses less digits than its factorization.

2121321020010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10076.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 2121321020010 its reverse (100201231212), we get a palindrome (2221522251222).

The spelling of 2121321020010 in words is "two trillion, one hundred twenty-one billion, three hundred twenty-one million, twenty thousand, ten".