20011222221210 has 96 divisors (see below), whose sum is σ = 57279829052160. Its totient is φ = 4806698889600.

The previous prime is 20011222221187. The next prime is 20011222221241. The reversal of 20011222221210 is 1212222211002.

It is a happy number.

20011222221210 is a `hidden beast` number, since 2 + 0 + 0 + 11 + 222 + 221 + 210 = 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 47 ways as a sum of consecutive naturals, for example, 92613906 + ... + 92829725.

It is an arithmetic number, because the mean of its divisors is an integer number (596664885960).

Almost surely, 2^{20011222221210} is an apocalyptic number.

20011222221210 is an abundant number, since it is smaller than the sum of its proper divisors (37268606830950).

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

20011222221210 is a wasteful number, since it uses less digits than its factorization.

20011222221210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185443764 (or 185443761 counting only the distinct ones).

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

Adding to 20011222221210 its reverse (1212222211002), we get a palindrome (21223444432212).

The spelling of 20011222221210 in words is "twenty trillion, eleven billion, two hundred twenty-two million, two hundred twenty-one thousand, two hundred ten".