2123012130320 has 80 divisors (see below), whose sum is σ = 4992073902000. Its totient is φ = 839560617984.

The previous prime is 2123012130319. The next prime is 2123012130457. The reversal of 2123012130320 is 230312103212.

It can be written as a sum of positive squares in 8 ways, for example, as 58755820816 + 2064256309504 = 242396^2 + 1436752^2 .

It is a tau number, because it is divible by the number of its divisors (80).

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 = 2123012130292 and 2123012130301.

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, 88340066 + ... + 88364094.

It is an arithmetic number, because the mean of its divisors is an integer number (62400923775).

Almost surely, 2^{2123012130320} is an apocalyptic number.

2123012130320 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 2123012130320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2496036951000).

2123012130320 is an abundant number, since it is smaller than the sum of its proper divisors (2869061771680).

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

2123012130320 is a wasteful number, since it uses less digits than its factorization.

2123012130320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36540 (or 36534 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 2123012130320 its reverse (230312103212), we get a palindrome (2353324233532).

The spelling of 2123012130320 in words is "two trillion, one hundred twenty-three billion, twelve million, one hundred thirty thousand, three hundred twenty".