2231021222021 has 4 divisors (see below), whose sum is σ = 2231025284544. Its totient is φ = 2231017159500.

The previous prime is 2231021221999. The next prime is 2231021222047. The reversal of 2231021222021 is 1202221201322.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2231021222021 is a prime.

It is a super-3 number, since 3×2231021222021³ (a number of 38 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2231021221984 and 2231021222002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2231021224021) 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, 1049255 + ... + 2358596.

It is an arithmetic number, because the mean of its divisors is an integer number (557756321136).

Almost surely, 2^{2231021222021} is an apocalyptic number.

It is an amenable number.

2231021222021 is a deficient number, since it is larger than the sum of its proper divisors (4062523).

2231021222021 is an equidigital number, since it uses as much as digits as its factorization.

2231021222021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4062522.

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 2231021222021 its reverse (1202221201322), we get a palindrome (3433242423343).

The spelling of 2231021222021 in words is "two trillion, two hundred thirty-one billion, twenty-one million, two hundred twenty-two thousand, twenty-one".