1211101226 has 4 divisors (see below), whose sum is σ = 1816651842. Its totient is φ = 605550612.

The previous prime is 1211101187. The next prime is 1211101237. The reversal of 1211101226 is 6221011121.

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

It can be written as a sum of positive squares in only one way, i.e., 746655625 + 464445601 = 27325^2 + 21551^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 302775305 + ... + 302775308.

Almost surely, 2^1211101226 is an apocalyptic number.

1211101226 is a deficient number, since it is larger than the sum of its proper divisors (605550616).

1211101226 is an equidigital number, since it uses as much as digits as its factorization.

1211101226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 605550615.

The product of its (nonzero) digits is 48, while the sum is 17.

The square root of 1211101226 is about 34800.8796727899. The cubic root of 1211101226 is about 1065.9254084128.

Adding to 1211101226 its reverse (6221011121), we get a palindrome (7432112347).

The spelling of 1211101226 in words is "one billion, two hundred eleven million, one hundred one thousand, two hundred twenty-six".