21020211202012 has 48 divisors (see below), whose sum is σ = 40225164102144. Its totient is φ = 9531865728000.

The previous prime is 21020211201989. The next prime is 21020211202013.

It is a happy number.

21020211202012 is nontrivially palindromic in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21020211202013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 446825212 + ... + 446872252.

It is an arithmetic number, because the mean of its divisors is an integer number (838024252128).

Almost surely, 2^{21020211202012} is an apocalyptic number.

21020211202012 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21020211202012 is a deficient number, since it is larger than the sum of its proper divisors (19204952900132).

21020211202012 is a wasteful number, since it uses less digits than its factorization.

21020211202012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71050 (or 71048 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

It can be divided in two parts, 2102021 and 1202012, that added together give a palindrome (3304033).

The spelling of 21020211202012 in words is "twenty-one trillion, twenty billion, two hundred eleven million, two hundred two thousand, twelve".