1222124212191 has 4 divisors (see below), whose sum is σ = 1629498949592. Its totient is φ = 814749474792.

The previous prime is 1222124212121. The next prime is 1222124212193. The reversal of 1222124212191 is 1912124212221.

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

It is not a de Polignac number, because 1222124212191 - 2⁷ = 1222124212063 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222124212193) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 203687368696 + ... + 203687368701.

It is an arithmetic number, because the mean of its divisors is an integer number (407374737398).

Almost surely, 2^{1222124212191} is an apocalyptic number.

1222124212191 is a deficient number, since it is larger than the sum of its proper divisors (407374737401).

1222124212191 is an equidigital number, since it uses as much as digits as its factorization.

1222124212191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 407374737400.

The product of its digits is 2304, while the sum is 30.

Adding to 1222124212191 its sum of digits (30), we get a palindrome (1222124212221).

The spelling of 1222124212191 in words is "one trillion, two hundred twenty-two billion, one hundred twenty-four million, two hundred twelve thousand, one hundred ninety-one".