21201111100202 has 16 divisors (see below), whose sum is σ = 34695491406912. Its totient is φ = 9636100861920.

The previous prime is 21201111100139. The next prime is 21201111100219. The reversal of 21201111100202 is 20200111110212.

It is a super-2 number, since 2×21201111100202² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38108558 + ... + 38660889.

It is an arithmetic number, because the mean of its divisors is an integer number (2168468212932).

Almost surely, 2^{21201111100202} is an apocalyptic number.

21201111100202 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21201111100202 is a deficient number, since it is larger than the sum of its proper divisors (13494380306710).

21201111100202 is a wasteful number, since it uses less digits than its factorization.

21201111100202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76782013.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 21201111100202 its reverse (20200111110212), we get a palindrome (41401222210414).

The spelling of 21201111100202 in words is "twenty-one trillion, two hundred one billion, one hundred eleven million, one hundred thousand, two hundred two".