20111101221222 has 80 divisors (see below), whose sum is σ = 49161606912000. Its totient is φ = 6094132115760.

The previous prime is 20111101221209. The next prime is 20111101221257. The reversal of 20111101221222 is 22212210111102.

20111101221222 is a `hidden beast` number, since 201 + 11 + 10 + 1 + 221 + 222 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 20111101221195 and 20111101221204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 97334779 + ... + 97541177.

It is an arithmetic number, because the mean of its divisors is an integer number (614520086400).

Almost surely, 2^{20111101221222} is an apocalyptic number.

20111101221222 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20111101221222 is an abundant number, since it is smaller than the sum of its proper divisors (29050505690778).

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

20111101221222 is a wasteful number, since it uses less digits than its factorization.

20111101221222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261103 (or 261094 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 20111101221222 its reverse (22212210111102), we get a palindrome (42323311332324).

The spelling of 20111101221222 in words is "twenty trillion, one hundred eleven billion, one hundred one million, two hundred twenty-one thousand, two hundred twenty-two".