21022112100202 has 16 divisors (see below), whose sum is σ = 31734759347712. Its totient is φ = 10443862119600.

The previous prime is 21022112100193. The next prime is 21022112100203. The reversal of 21022112100202 is 20200121122012.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (21022112100203) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13036327 + ... + 14559877.

It is an arithmetic number, because the mean of its divisors is an integer number (1983422459232).

Almost surely, 2^{21022112100202} is an apocalyptic number.

21022112100202 is a deficient number, since it is larger than the sum of its proper divisors (10712647247510).

21022112100202 is a wasteful number, since it uses less digits than its factorization.

21022112100202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1567653.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21022112100202 its reverse (20200121122012), we get a palindrome (41222233222214).

The spelling of 21022112100202 in words is "twenty-one trillion, twenty-two billion, one hundred twelve million, one hundred thousand, two hundred two".