2121121012320 has 72 divisors (see below), whose sum is σ = 7238325459456. Its totient is φ = 565632269568.

The previous prime is 2121121012303. The next prime is 2121121012327. The reversal of 2121121012320 is 232101211212.

2121121012320 is a `hidden beast` number, since 2 + 121 + 1 + 210 + 12 + 320 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 2121121012293 and 2121121012302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121121012327) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 736498912 + ... + 736501791.

It is an arithmetic number, because the mean of its divisors is an integer number (100532298048).

Almost surely, 2^{2121121012320} is an apocalyptic number.

2121121012320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2121121012320 is an abundant number, since it is smaller than the sum of its proper divisors (5117204447136).

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

2121121012320 is a wasteful number, since it uses less digits than its factorization.

2121121012320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1473000724 (or 1473000713 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 2121121012320 its reverse (232101211212), we get a palindrome (2353222223532).

The spelling of 2121121012320 in words is "two trillion, one hundred twenty-one billion, one hundred twenty-one million, twelve thousand, three hundred twenty".