1322220021 has 16 divisors (see below), whose sum is σ = 1842739200. Its totient is φ = 841720880.

The previous prime is 1322219923. The next prime is 1322220041. The reversal of 1322220021 is 1200222231.

It is a happy number.

It is not a de Polignac number, because 1322220021 - 2¹¹ = 1322217973 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1322220041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25336 + ... + 57326.

It is an arithmetic number, because the mean of its divisors is an integer number (115171200).

Almost surely, 2^1322220021 is an apocalyptic number.

It is an amenable number.

1322220021 is a deficient number, since it is larger than the sum of its proper divisors (520519179).

1322220021 is a wasteful number, since it uses less digits than its factorization.

1322220021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32616.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 1322220021 is about 36362.3434475832. The cubic root of 1322220021 is about 1097.5759350258.

Adding to 1322220021 its reverse (1200222231), we get a palindrome (2522442252).

The spelling of 1322220021 in words is "one billion, three hundred twenty-two million, two hundred twenty thousand, twenty-one".