21112023031040 has 72 divisors (see below), whose sum is σ = 50606728556328. Its totient is φ = 8438657884160.

The previous prime is 21112023031039. The next prime is 21112023031091. The reversal of 21112023031040 is 4013032021112.

It can be written as a sum of positive squares in 4 ways, for example, as 3633201961216 + 17478821069824 = 1906096^2 + 4180768^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4249031 + ... + 7763910.

It is an arithmetic number, because the mean of its divisors is an integer number (702871229949).

Almost surely, 2^{21112023031040} is an apocalyptic number.

21112023031040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21112023031040 is an abundant number, since it is smaller than the sum of its proper divisors (29494705525288).

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

21112023031040 is a wasteful number, since it uses less digits than its factorization.

21112023031040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12014335 (or 12014321 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 21112023031040 its reverse (4013032021112), we get a palindrome (25125055052152).

The spelling of 21112023031040 in words is "twenty-one trillion, one hundred twelve billion, twenty-three million, thirty-one thousand, forty".