1012111223212 has 24 divisors (see below), whose sum is σ = 1869697090800. Its totient is φ = 478062959616.

The previous prime is 1012111223197. The next prime is 1012111223237. The reversal of 1012111223212 is 2123221112101.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a self number, because there is not a number n which added to its sum of digits gives 1012111223212.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18836137 + ... + 18889792.

It is an arithmetic number, because the mean of its divisors is an integer number (77904045450).

Almost surely, 2^{1012111223212} is an apocalyptic number.

It is an amenable number.

1012111223212 is a deficient number, since it is larger than the sum of its proper divisors (857585867588).

1012111223212 is a wasteful number, since it uses less digits than its factorization.

1012111223212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37726305 (or 37726303 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 1012111223212 its reverse (2123221112101), we get a palindrome (3135332335313).

The spelling of 1012111223212 in words is "one trillion, twelve billion, one hundred eleven million, two hundred twenty-three thousand, two hundred twelve".