1322100021 has 16 divisors (see below), whose sum is σ = 1975030848. Its totient is φ = 779616000.

The previous prime is 1322100011. The next prime is 1322100041. The reversal of 1322100021 is 1200012231.

It is not a de Polignac number, because 1322100021 - 2²⁵ = 1288545589 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1322100011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 540180 + ... + 542621.

It is an arithmetic number, because the mean of its divisors is an integer number (123439428).

Almost surely, 2^1322100021 is an apocalyptic number.

1322100021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1322100021 is a deficient number, since it is larger than the sum of its proper divisors (652930827).

1322100021 is a wasteful number, since it uses less digits than its factorization.

1322100021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1082852.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 1322100021 is about 36360.6933514750. The cubic root of 1322100021 is about 1097.5427299881.

Adding to 1322100021 its reverse (1200012231), we get a palindrome (2522112252).

It can be divided in two parts, 132 and 2100021, that multiplied together give a palindrome (277202772).

The spelling of 1322100021 in words is "one billion, three hundred twenty-two million, one hundred thousand, twenty-one".