21020244202012 has 24 divisors (see below), whose sum is σ = 40129976017152. Its totient is φ = 9554556716400.

The previous prime is 21020244201973. The next prime is 21020244202019.

21020244202012 is nontrivially palindromic in base 10.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21020244202019) by changing a digit.

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, 1854663 + ... + 6743905.

It is an arithmetic number, because the mean of its divisors is an integer number (1672082334048).

Almost surely, 2^{21020244202012} is an apocalyptic number.

21020244202012 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21020244202012 is a deficient number, since it is larger than the sum of its proper divisors (19109731815140).

21020244202012 is a wasteful number, since it uses less digits than its factorization.

21020244202012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4986969 (or 4986967 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 22.

It can be divided in two parts, 2102024 and 4202012, that added together give a palindrome (6304036).

The spelling of 21020244202012 in words is "twenty-one trillion, twenty billion, two hundred forty-four million, two hundred two thousand, twelve".