1022222211211 has 4 divisors (see below), whose sum is σ = 1022733580000. Its totient is φ = 1021710842424.

The previous prime is 1022222211191. The next prime is 1022222211223. The reversal of 1022222211211 is 1121122222201.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1022222211211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1022222215211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 255681396 + ... + 255685393.

It is an arithmetic number, because the mean of its divisors is an integer number (255683395000).

Almost surely, 2^{1022222211211} is an apocalyptic number.

1022222211211 is a deficient number, since it is larger than the sum of its proper divisors (511368789).

1022222211211 is an equidigital number, since it uses as much as digits as its factorization.

1022222211211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 511368788.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 1022222211211 its reverse (1121122222201), we get a palindrome (2143344433412).

The spelling of 1022222211211 in words is "one trillion, twenty-two billion, two hundred twenty-two million, two hundred eleven thousand, two hundred eleven".