1222011101 has 4 divisors (see below), whose sum is σ = 1222659900. Its totient is φ = 1221362304.

The previous prime is 1222011071. The next prime is 1222011107. The reversal of 1222011101 is 1011102221.

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

It can be written as a sum of positive squares in 2 ways, for example, as 883635076 + 338376025 = 29726^2 + 18395^2 .

It is a cyclic number.

It is not a de Polignac number, because 1222011101 - 2²⁶ = 1154902237 is a prime.

It is a super-2 number, since 2×1222011101² = 2986622261934464402, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222011107) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 321566 + ... + 325343.

It is an arithmetic number, because the mean of its divisors is an integer number (305664975).

Almost surely, 2^1222011101 is an apocalyptic number.

It is an amenable number.

1222011101 is a deficient number, since it is larger than the sum of its proper divisors (648799).

1222011101 is an equidigital number, since it uses as much as digits as its factorization.

1222011101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 648798.

The product of its (nonzero) digits is 8, while the sum is 11.

The square root of 1222011101 is about 34957.2753657947. The cubic root of 1222011101 is about 1069.1165447656.

Adding to 1222011101 its reverse (1011102221), we get a palindrome (2233113322).

The spelling of 1222011101 in words is "one billion, two hundred twenty-two million, eleven thousand, one hundred one".