21010344143120 has 80 divisors (see below), whose sum is σ = 51425545846080. Its totient is φ = 7960964083200.

The previous prime is 21010344143093. The next prime is 21010344143143. The reversal of 21010344143120 is 2134144301012.

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

It is a super-2 number, since 2×21010344143120² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21010344143120.

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, 13586315 + ... + 15053525.

It is an arithmetic number, because the mean of its divisors is an integer number (642819323076).

Almost surely, 2^{21010344143120} is an apocalyptic number.

21010344143120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21010344143120 is an abundant number, since it is smaller than the sum of its proper divisors (30415201702960).

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

21010344143120 is a wasteful number, since it uses less digits than its factorization.

21010344143120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1476664 (or 1476658 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 26.

Adding to 21010344143120 its reverse (2134144301012), we get a palindrome (23144488444132).

The spelling of 21010344143120 in words is "twenty-one trillion, ten billion, three hundred forty-four million, one hundred forty-three thousand, one hundred twenty".