21012113001120 has 96 divisors (see below), whose sum is σ = 66194497700352. Its totient is φ = 5602693266432.

The previous prime is 21012113000951. The next prime is 21012113001151. The reversal of 21012113001120 is 2110031121012.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×21012113001120² (a number of 27 digits) contains 22 as substring.

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

It is a self number, because there is not a number n which added to its sum of digits gives 21012113001120.

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, 2930334 + ... + 7114146.

It is an arithmetic number, because the mean of its divisors is an integer number (689526017712).

Almost surely, 2^{21012113001120} is an apocalyptic number.

21012113001120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21012113001120 is an abundant number, since it is smaller than the sum of its proper divisors (45182384699232).

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

21012113001120 is a wasteful number, since it uses less digits than its factorization.

21012113001120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4194294 (or 4194286 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 21012113001120 its reverse (2110031121012), we get a palindrome (23122144122132).

The spelling of 21012113001120 in words is "twenty-one trillion, twelve billion, one hundred thirteen million, one thousand, one hundred twenty".