21220122102210 has 64 divisors (see below), whose sum is σ = 57087762197760. Its totient is φ = 5608622234880.

The previous prime is 21220122102173. The next prime is 21220122102227. The reversal of 21220122102210 is 1220122102212.

It is a happy number.

21220122102210 is a `hidden beast` number, since 2 + 1 + 220 + 1 + 221 + 0 + 221 + 0 = 666.

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

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 347726326 + ... + 347787345.

It is an arithmetic number, because the mean of its divisors is an integer number (891996284340).

Almost surely, 2^{21220122102210} is an apocalyptic number.

21220122102210 is an abundant number, since it is smaller than the sum of its proper divisors (35867640095550).

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

21220122102210 is a wasteful number, since it uses less digits than its factorization.

21220122102210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 695513800 (or 695513794 counting only the distinct ones).

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

Adding to 21220122102210 its reverse (1220122102212), we get a palindrome (22440244204422).

The spelling of 21220122102210 in words is "twenty-one trillion, two hundred twenty billion, one hundred twenty-two million, one hundred two thousand, two hundred ten".