20111002212222 has 32 divisors (see below), whose sum is σ = 44712571445760. Its totient is φ = 6700449091320.

The previous prime is 20111002212181. The next prime is 20111002212233. The reversal of 20111002212222 is 22221220011102.

It is a happy number.

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 = 20111002212195 and 20111002212204.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 89284054 + ... + 89509017.

It is an arithmetic number, because the mean of its divisors is an integer number (1397267857680).

Almost surely, 2^{20111002212222} is an apocalyptic number.

20111002212222 is an abundant number, since it is smaller than the sum of its proper divisors (24601569233538).

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

20111002212222 is a wasteful number, since it uses less digits than its factorization.

20111002212222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178795165 (or 178795159 counting only the distinct ones).

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

Adding to 20111002212222 its reverse (22221220011102), we get a palindrome (42332222223324).

The spelling of 20111002212222 in words is "twenty trillion, one hundred eleven billion, two million, two hundred twelve thousand, two hundred twenty-two".