21010012201212 has 96 divisors (see below), whose sum is σ = 50247719165952. Its totient is φ = 6829518237696.

The previous prime is 21010012201111. The next prime is 21010012201261. The reversal of 21010012201212 is 21210221001012.

It is a super-2 number, since 2×21010012201212² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21010012201191 and 21010012201200.

It is a congruent number.

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, 1047191893 + ... + 1047211955.

It is an arithmetic number, because the mean of its divisors is an integer number (523413741312).

Almost surely, 2^{21010012201212} is an apocalyptic number.

It is an amenable number.

21010012201212 is an abundant number, since it is smaller than the sum of its proper divisors (29237706964740).

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

21010012201212 is a wasteful number, since it uses less digits than its factorization.

21010012201212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26747 (or 26745 counting only the distinct ones).

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

Adding to 21010012201212 its reverse (21210221001012), we get a palindrome (42220233202224).

The spelling of 21010012201212 in words is "twenty-one trillion, ten billion, twelve million, two hundred one thousand, two hundred twelve".