22101212220210 has 24 divisors (see below), whose sum is σ = 57463151772780. Its totient is φ = 5893656592032.

The previous prime is 22101212220167. The next prime is 22101212220211. The reversal of 22101212220210 is 1202221210122.

It is a happy number.

22101212220210 is a `hidden beast` number, since 2 + 21 + 0 + 1 + 212 + 220 + 210 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 22041363001329 + 59849218881 = 4694823^2 + 244641^2 .

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 (22101212220211) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 122784512245 + ... + 122784512424.

Almost surely, 2^{22101212220210} is an apocalyptic number.

22101212220210 is an abundant number, since it is smaller than the sum of its proper divisors (35361939552570).

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

22101212220210 is a wasteful number, since it uses less digits than its factorization.

22101212220210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245569024682 (or 245569024679 counting only the distinct ones).

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

Adding to 22101212220210 its reverse (1202221210122), we get a palindrome (23303433430332).

The spelling of 22101212220210 in words is "twenty-two trillion, one hundred one billion, two hundred twelve million, two hundred twenty thousand, two hundred ten".