1228822101 has 24 divisors (see below), whose sum is σ = 2023945560. Its totient is φ = 711714816.

The previous prime is 1228822079. The next prime is 1228822103. The reversal of 1228822101 is 1012288221.

It can be written as a sum of positive squares in 4 ways, for example, as 407999601 + 820822500 = 20199^2 + 28650^2 .

It is not a de Polignac number, because 1228822101 - 2⁵ = 1228822069 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1228822103) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 306916 + ... + 310893.

It is an arithmetic number, because the mean of its divisors is an integer number (84331065).

Almost surely, 2^1228822101 is an apocalyptic number.

It is an amenable number.

1228822101 is a deficient number, since it is larger than the sum of its proper divisors (795123459).

1228822101 is a wasteful number, since it uses less digits than its factorization.

1228822101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 617845 (or 617842 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 27.

The square root of 1228822101 is about 35054.5589189195. The cubic root of 1228822101 is about 1071.0991415937.

The spelling of 1228822101 in words is "one billion, two hundred twenty-eight million, eight hundred twenty-two thousand, one hundred one".