1321122101 has 4 divisors (see below), whose sum is σ = 1422746892. Its totient is φ = 1219497312.

The previous prime is 1321122083. The next prime is 1321122109. The reversal of 1321122101 is 1012211231.

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 818017201 + 503104900 = 28601^2 + 22430^2 .

It is a cyclic number.

It is not a de Polignac number, because 1321122101 - 2¹⁸ = 1320859957 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321122109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50812376 + ... + 50812401.

It is an arithmetic number, because the mean of its divisors is an integer number (355686723).

Almost surely, 2^1321122101 is an apocalyptic number.

It is an amenable number.

1321122101 is a deficient number, since it is larger than the sum of its proper divisors (101624791).

1321122101 is a wasteful number, since it uses less digits than its factorization.

1321122101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101624790.

The product of its (nonzero) digits is 24, while the sum is 14.

The square root of 1321122101 is about 36347.2433755299. The cubic root of 1321122101 is about 1097.2720561333.

Adding to 1321122101 its reverse (1012211231), we get a palindrome (2333333332).

The spelling of 1321122101 in words is "one billion, three hundred twenty-one million, one hundred twenty-two thousand, one hundred one".