21201002020212 has 48 divisors (see below), whose sum is σ = 56548434633600. Its totient is φ = 6056097443712.

The previous prime is 21201002020171. The next prime is 21201002020243. The reversal of 21201002020212 is 21202020010212.

It is a super-2 number, since 2×21201002020212² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21201002020191 and 21201002020200.

It is a congruent number.

It is an unprimeable number.

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, 27359463 + ... + 28123694.

It is an arithmetic number, because the mean of its divisors is an integer number (1178092388200).

Almost surely, 2^{21201002020212} is an apocalyptic number.

It is an amenable number.

21201002020212 is an abundant number, since it is smaller than the sum of its proper divisors (35347432613388).

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

21201002020212 is a wasteful number, since it uses less digits than its factorization.

21201002020212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55487720 (or 55487718 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 21201002020212 its reverse (21202020010212), we get a palindrome (42403022030424).

The spelling of 21201002020212 in words is "twenty-one trillion, two hundred one billion, two million, twenty thousand, two hundred twelve".