21201111021202 has 32 divisors (see below), whose sum is σ = 36569134328832. Its totient is φ = 9030117352464.

The previous prime is 21201111021193. The next prime is 21201111021203. The reversal of 21201111021202 is 20212011110212.

It is a super-2 number, since 2×21201111021202² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21201111021203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11892733 + ... + 13558735.

It is an arithmetic number, because the mean of its divisors is an integer number (1142785447776).

Almost surely, 2^{21201111021202} is an apocalyptic number.

21201111021202 is a deficient number, since it is larger than the sum of its proper divisors (15368023307630).

21201111021202 is a wasteful number, since it uses less digits than its factorization.

21201111021202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1671622.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 21201111021202 its reverse (20212011110212), we get a palindrome (41413122131414).

The spelling of 21201111021202 in words is "twenty-one trillion, two hundred one billion, one hundred eleven million, twenty-one thousand, two hundred two".