21010011020212 has 48 divisors (see below), whose sum is σ = 38607375340800. Its totient is φ = 9990496696320.

The previous prime is 21010011020189. The next prime is 21010011020231. The reversal of 21010011020212 is 21202011001012.

It is a junction number, because it is equal to n+sod(n) for n = 21010011020192 and 21010011020201.

It is a congruent number.

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, 7554964 + ... + 9954772.

It is an arithmetic number, because the mean of its divisors is an integer number (804320319600).

Almost surely, 2^{21010011020212} is an apocalyptic number.

It is an amenable number.

21010011020212 is a deficient number, since it is larger than the sum of its proper divisors (17597364320588).

21010011020212 is a wasteful number, since it uses less digits than its factorization.

21010011020212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2400976 (or 2400974 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 21010011020212 its reverse (21202011001012), we get a palindrome (42212022021224).

It can be divided in two parts, 2101001 and 1020212, that added together give a palindrome (3121213).

The spelling of 21010011020212 in words is "twenty-one trillion, ten billion, eleven million, twenty thousand, two hundred twelve".