1021122223312 has 40 divisors (see below), whose sum is σ = 2118339361800. Its totient is φ = 475128901632.

The previous prime is 1021122223283. The next prime is 1021122223313. The reversal of 1021122223312 is 2133222211201.

It can be written as a sum of positive squares in 4 ways, for example, as 11651907136 + 1009470316176 = 107944^2 + 1004724^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021122223313) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21066387 + ... + 21114802.

It is an arithmetic number, because the mean of its divisors is an integer number (52958484045).

Almost surely, 2^{1021122223312} is an apocalyptic number.

It is an amenable number.

1021122223312 is an abundant number, since it is smaller than the sum of its proper divisors (1097217138488).

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

1021122223312 is a wasteful number, since it uses less digits than its factorization.

1021122223312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42181303 (or 42181297 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 1021122223312 its reverse (2133222211201), we get a palindrome (3154344434513).

The spelling of 1021122223312 in words is "one trillion, twenty-one billion, one hundred twenty-two million, two hundred twenty-three thousand, three hundred twelve".