1222312311011 has 4 divisors (see below), whose sum is σ = 1333431612024. Its totient is φ = 1111193010000.

The previous prime is 1222312311007. The next prime is 1222312311019. The reversal of 1222312311011 is 1101132132221.

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

It is a cyclic number.

It is not a de Polignac number, because 1222312311011 - 2² = 1222312311007 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1222312311019) 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, 55559650490 + ... + 55559650511.

It is an arithmetic number, because the mean of its divisors is an integer number (333357903006).

Almost surely, 2^{1222312311011} is an apocalyptic number.

1222312311011 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1222312311011 is a deficient number, since it is larger than the sum of its proper divisors (111119301013).

1222312311011 is a wasteful number, since it uses less digits than its factorization.

1222312311011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111119301012.

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 1222312311011 its reverse (1101132132221), we get a palindrome (2323444443232).

The spelling of 1222312311011 in words is "one trillion, two hundred twenty-two billion, three hundred twelve million, three hundred eleven thousand, eleven".