21211010111202 has 32 divisors (see below), whose sum is σ = 43575974870400. Its totient is φ = 6878075960448.

The previous prime is 21211010111147. The next prime is 21211010111219. The reversal of 21211010111202 is 20211101011212.

It is a happy number.

It is a super-4 number, since 4×21211010111202⁴ (a number of 54 digits) contains 4444 as substring.

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, 6820827 + ... + 9431102.

It is an arithmetic number, because the mean of its divisors is an integer number (1361749214700).

Almost surely, 2^{21211010111202} is an apocalyptic number.

21211010111202 is an abundant number, since it is smaller than the sum of its proper divisors (22364964759198).

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

21211010111202 is a wasteful number, since it uses less digits than its factorization.

21211010111202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16257850.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 21211010111202 its reverse (20211101011212), we get a palindrome (41422111122414).

The spelling of 21211010111202 in words is "twenty-one trillion, two hundred eleven billion, ten million, one hundred eleven thousand, two hundred two".