1222121891149 has 2 divisors, whose sum is σ = 1222121891150. Its totient is φ = 1222121891148.

The previous prime is 1222121891099. The next prime is 1222121891183. The reversal of 1222121891149 is 9411981212221.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 840577248900 + 381544642249 = 916830^2 + 617693^2 .

It is a cyclic number.

It is not a de Polignac number, because 1222121891149 - 2⁹ = 1222121890637 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1222121891849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611060945574 + 611060945575.

It is an arithmetic number, because the mean of its divisors is an integer number (611060945575).

Almost surely, 2^{1222121891149} is an apocalyptic number.

It is an amenable number.

1222121891149 is a deficient number, since it is larger than the sum of its proper divisors (1).

1222121891149 is an equidigital number, since it uses as much as digits as its factorization.

1222121891149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 41472, while the sum is 43.

The spelling of 1222121891149 in words is "one trillion, two hundred twenty-two billion, one hundred twenty-one million, eight hundred ninety-one thousand, one hundred forty-nine".