1022212111121 has 4 divisors (see below), whose sum is σ = 1022421200100. Its totient is φ = 1022003022144.

The previous prime is 1022212111093. The next prime is 1022212111153. The reversal of 1022212111121 is 1211112122201.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 355139716096 + 667072395025 = 595936^2 + 816745^2 .

It is a cyclic number.

It is not a de Polignac number, because 1022212111121 - 2⁶ = 1022212111057 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1022212111121.

It is not an unprimeable number, because it can be changed into a prime (1022212111321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 104537156 + ... + 104546933.

It is an arithmetic number, because the mean of its divisors is an integer number (255605300025).

Almost surely, 2^{1022212111121} is an apocalyptic number.

It is an amenable number.

1022212111121 is a deficient number, since it is larger than the sum of its proper divisors (209088979).

1022212111121 is an equidigital number, since it uses as much as digits as its factorization.

1022212111121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209088978.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 1022212111121 its reverse (1211112122201), we get a palindrome (2233324233322).

The spelling of 1022212111121 in words is "one trillion, twenty-two billion, two hundred twelve million, one hundred eleven thousand, one hundred twenty-one".