1012111122222 has 24 divisors (see below), whose sum is σ = 2321901986976. Its totient is φ = 317525057856.

The previous prime is 1012111122199. The next prime is 1012111122229. The reversal of 1012111122222 is 2222211112101.

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 = 1012111122195 and 1012111122204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1012111122229) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1653776038 + ... + 1653776649.

It is an arithmetic number, because the mean of its divisors is an integer number (96745916124).

Almost surely, 2^{1012111122222} is an apocalyptic number.

1012111122222 is an abundant number, since it is smaller than the sum of its proper divisors (1309790864754).

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

1012111122222 is a wasteful number, since it uses less digits than its factorization.

1012111122222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3307552712 (or 3307552709 counting only the distinct ones).

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

Adding to 1012111122222 its reverse (2222211112101), we get a palindrome (3234322234323).

The spelling of 1012111122222 in words is "one trillion, twelve billion, one hundred eleven million, one hundred twenty-two thousand, two hundred twenty-two".