20111012211222 has 24 divisors (see below), whose sum is σ = 43600061816064. Its totient is φ = 6699639656304.

The previous prime is 20111012211197. The next prime is 20111012211247. The reversal of 20111012211222 is 22211221011102.

20111012211222 is a `hidden beast` number, since 201 + 110 + 122 + 11 + 222 = 666.

It is an interprime number because it is at equal distance from previous prime (20111012211197) and next prime (20111012211247).

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 = 20111012211195 and 20111012211204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 335892633 + ... + 335952500.

It is an arithmetic number, because the mean of its divisors is an integer number (1816669242336).

Almost surely, 2^{20111012211222} is an apocalyptic number.

20111012211222 is an abundant number, since it is smaller than the sum of its proper divisors (23489049604842).

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

20111012211222 is a wasteful number, since it uses less digits than its factorization.

20111012211222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 671846804 (or 671846801 counting only the distinct ones).

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

Adding to 20111012211222 its reverse (22211221011102), we get a palindrome (42322233222324).

The spelling of 20111012211222 in words is "twenty trillion, one hundred eleven billion, twelve million, two hundred eleven thousand, two hundred twenty-two".