21122112200202 has 24 divisors (see below), whose sum is σ = 49284928467684. Its totient is φ = 6499111446144.

The previous prime is 21122112200107. The next prime is 21122112200209. The reversal of 21122112200202 is 20200221122112.

It is a happy number.

21122112200202 is a `hidden beast` number, since 21 + 1 + 221 + 1 + 220 + 0 + 202 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 17393579054721 + 3728533145481 = 4170561^2 + 1930941^2 .

It is a super-2 number, since 2×21122112200202² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (21122112200209) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 45132718143 + ... + 45132718610.

Almost surely, 2^{21122112200202} is an apocalyptic number.

21122112200202 is an abundant number, since it is smaller than the sum of its proper divisors (28162816267482).

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

21122112200202 is a wasteful number, since it uses less digits than its factorization.

21122112200202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90265436774 (or 90265436771 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 21122112200202 its reverse (20200221122112), we get a palindrome (41322333322314).

The spelling of 21122112200202 in words is "twenty-one trillion, one hundred twenty-two billion, one hundred twelve million, two hundred thousand, two hundred two".