222131332021 has 2 divisors, whose sum is σ = 222131332022. Its totient is φ = 222131332020.

The previous prime is 222131331979. The next prime is 222131332037. The reversal of 222131332021 is 120233131222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 221177387025 + 953944996 = 470295^2 + 30886^2 .

It is a cyclic number.

It is not a de Polignac number, because 222131332021 - 2⁷ = 222131331893 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 222131331983 and 222131332001.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (222131338021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111065666010 + 111065666011.

It is an arithmetic number, because the mean of its divisors is an integer number (111065666011).

Almost surely, 2^222131332021 is an apocalyptic number.

It is an amenable number.

222131332021 is a deficient number, since it is larger than the sum of its proper divisors (1).

222131332021 is an equidigital number, since it uses as much as digits as its factorization.

222131332021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 222131332021 its reverse (120233131222), we get a palindrome (342364463243).

The spelling of 222131332021 in words is "two hundred twenty-two billion, one hundred thirty-one million, three hundred thirty-two thousand, twenty-one".