1331222202021 has 16 divisors (see below), whose sum is σ = 1823445933248. Its totient is φ = 863253417600.

The previous prime is 1331222202017. The next prime is 1331222202047. The reversal of 1331222202021 is 1202022221331.

It is not a de Polignac number, because 1331222202021 - 2² = 1331222202017 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 (1331222202061) 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, 1282840 + ... + 2075601.

It is an arithmetic number, because the mean of its divisors is an integer number (113965370828).

Almost surely, 2^{1331222202021} is an apocalyptic number.

It is an amenable number.

1331222202021 is a deficient number, since it is larger than the sum of its proper divisors (492223731227).

1331222202021 is a wasteful number, since it uses less digits than its factorization.

1331222202021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3362052.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 1331222202021 its reverse (1202022221331), we get a palindrome (2533244423352).

The spelling of 1331222202021 in words is "one trillion, three hundred thirty-one billion, two hundred twenty-two million, two hundred two thousand, twenty-one".