1222202101 has 4 divisors (see below), whose sum is σ = 1245262572. Its totient is φ = 1199141632.

The previous prime is 1222202077. The next prime is 1222202123. The reversal of 1222202101 is 1012022221.

It is a happy number.

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 1115493201 + 106708900 = 33399^2 + 10330^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1222202101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222202701) 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, 11530156 + ... + 11530261.

It is an arithmetic number, because the mean of its divisors is an integer number (311315643).

Almost surely, 2^1222202101 is an apocalyptic number.

It is an amenable number.

1222202101 is a deficient number, since it is larger than the sum of its proper divisors (23060471).

1222202101 is an equidigital number, since it uses as much as digits as its factorization.

1222202101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23060470.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 1222202101 is about 34960.0071653311. The cubic root of 1222202101 is about 1069.1722427381.

Adding to 1222202101 its reverse (1012022221), we get a palindrome (2234224322).

The spelling of 1222202101 in words is "one billion, two hundred twenty-two million, two hundred two thousand, one hundred one".