21010002211212 has 96 divisors (see below), whose sum is σ = 56340143591424. Its totient is φ = 5969297203200.

The previous prime is 21010002211199. The next prime is 21010002211267. The reversal of 21010002211212 is 21211220001012.

It is a junction number, because it is equal to n+sod(n) for n = 21010002211191 and 21010002211200.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 39308037 + ... + 39838947.

It is an arithmetic number, because the mean of its divisors is an integer number (586876495744).

Almost surely, 2^{21010002211212} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21010002211212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28170071795712).

21010002211212 is an abundant number, since it is smaller than the sum of its proper divisors (35330141380212).

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

21010002211212 is a wasteful number, since it uses less digits than its factorization.

21010002211212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 533559 (or 533557 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 21010002211212 its reverse (21211220001012), we get a palindrome (42221222212224).

The spelling of 21010002211212 in words is "twenty-one trillion, ten billion, two million, two hundred eleven thousand, two hundred twelve".