21122112202202 has 24 divisors (see below), whose sum is σ = 35002078952148. Its totient is φ = 9552224232320.

The previous prime is 21122112202159. The next prime is 21122112202207. The reversal of 21122112202202 is 20220221122112.

It can be written as a sum of positive squares in 2 ways, for example, as 13563907092241 + 7558205109961 = 3682921^2 + 2749219^2 .

It is a super-2 number, since 2×21122112202202² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21122112202207) 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, 221478863 + ... + 221574210.

Almost surely, 2^{21122112202202} is an apocalyptic number.

21122112202202 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21122112202202 is a deficient number, since it is larger than the sum of its proper divisors (13879966749946).

21122112202202 is a wasteful number, since it uses less digits than its factorization.

21122112202202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 443053294 (or 443053283 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 21122112202202 its reverse (20220221122112), we get a palindrome (41342333324314).

The spelling of 21122112202202 in words is "twenty-one trillion, one hundred twenty-two billion, one hundred twelve million, two hundred two thousand, two hundred two".