1211144422 has 4 divisors (see below), whose sum is σ = 1816716636. Its totient is φ = 605572210.

The previous prime is 1211144411. The next prime is 1211144471. The reversal of 1211144422 is 2244411121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2244411121 = 727 ⋅3087223.

It is a junction number, because it is equal to n+sod(n) for n = 1211144393 and 1211144402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 302786104 + ... + 302786107.

It is an arithmetic number, because the mean of its divisors is an integer number (454179159).

Almost surely, 2^1211144422 is an apocalyptic number.

1211144422 is a deficient number, since it is larger than the sum of its proper divisors (605572214).

1211144422 is an equidigital number, since it uses as much as digits as its factorization.

1211144422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 605572213.

The product of its digits is 512, while the sum is 22.

The square root of 1211144422 is about 34801.5002837521. The cubic root of 1211144422 is about 1065.9380809474.

Adding to 1211144422 its reverse (2244411121), we get a palindrome (3455555543).

The spelling of 1211144422 in words is "one billion, two hundred eleven million, one hundred forty-four thousand, four hundred twenty-two".