1211000122 has 4 divisors (see below), whose sum is σ = 1816500186. Its totient is φ = 605500060.

The previous prime is 1211000081. The next prime is 1211000159. The reversal of 1211000122 is 2210001121.

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., 964164601 + 246835521 = 31051^2 + 15711^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1211000099 and 1211000108.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 302750029 + ... + 302750032.

Almost surely, 2^1211000122 is an apocalyptic number.

1211000122 is a deficient number, since it is larger than the sum of its proper divisors (605500064).

1211000122 is an equidigital number, since it uses as much as digits as its factorization.

1211000122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 605500063.

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 1211000122 is about 34799.4270355131. The cubic root of 1211000122 is about 1065.8957460639.

Adding to 1211000122 its reverse (2210001121), we get a palindrome (3421001243).

Subtracting 1211000122 from its reverse (2210001121), we obtain a palindrome (999000999).

The spelling of 1211000122 in words is "one billion, two hundred eleven million, one hundred twenty-two", and thus it is an aban number.