21121222200202 has 32 divisors (see below), whose sum is σ = 33578816882688. Its totient is φ = 9929522973696.

The previous prime is 21121222200191. The next prime is 21121222200217. The reversal of 21121222200202 is 20200222212112.

It is a super-2 number, since 2×21121222200202² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21121222200202.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 148568418 + ... + 148710514.

It is an arithmetic number, because the mean of its divisors is an integer number (1049338027584).

Almost surely, 2^{21121222200202} is an apocalyptic number.

21121222200202 is a deficient number, since it is larger than the sum of its proper divisors (12457594682486).

21121222200202 is a wasteful number, since it uses less digits than its factorization.

21121222200202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146430.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 21121222200202 its reverse (20200222212112), we get a palindrome (41321444412314).

The spelling of 21121222200202 in words is "twenty-one trillion, one hundred twenty-one billion, two hundred twenty-two million, two hundred thousand, two hundred two".