21010223323120 has 40 divisors (see below), whose sum is σ = 48861234555840. Its totient is φ = 8401944756480.

The previous prime is 21010223323091. The next prime is 21010223323147. The reversal of 21010223323120 is 2132332201012.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 21010223323091 and 21010223323100.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33193471 + ... + 33820510.

It is an arithmetic number, because the mean of its divisors is an integer number (1221530863896).

Almost surely, 2^{21010223323120} is an apocalyptic number.

21010223323120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21010223323120 is an abundant number, since it is smaller than the sum of its proper divisors (27851011232720).

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

21010223323120 is a wasteful number, since it uses less digits than its factorization.

21010223323120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67017913 (or 67017907 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 21010223323120 its reverse (2132332201012), we get a palindrome (23142555524132).

The spelling of 21010223323120 in words is "twenty-one trillion, ten billion, two hundred twenty-three million, three hundred twenty-three thousand, one hundred twenty".