1211210122 has 4 divisors (see below), whose sum is σ = 1816815186. Its totient is φ = 605605060.

The previous prime is 1211210089. The next prime is 1211210129. The reversal of 1211210122 is 2210121121.

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., 669205161 + 542004961 = 25869^2 + 23281^2 .

It is not an unprimeable number, because it can be changed into a prime (1211210129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 302802529 + ... + 302802532.

Almost surely, 2^1211210122 is an apocalyptic number.

1211210122 is a deficient number, since it is larger than the sum of its proper divisors (605605064).

1211210122 is an equidigital number, since it uses as much as digits as its factorization.

1211210122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 605605063.

The product of its (nonzero) digits is 16, while the sum is 13.

The square root of 1211210122 is about 34802.4441957745. Note that the first 3 decimals coincide. The cubic root of 1211210122 is about 1065.9573549675.

Adding to 1211210122 its reverse (2210121121), we get a palindrome (3421331243).

The spelling of 1211210122 in words is "one billion, two hundred eleven million, two hundred ten thousand, one hundred twenty-two".