272222021 has 2 divisors, whose sum is σ = 272222022. Its totient is φ = 272222020.

The previous prime is 272221993. The next prime is 272222029. The reversal of 272222021 is 120222272.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 199204996 + 73017025 = 14114^2 + 8545^2 .

It is a cyclic number.

It is not a de Polignac number, because 272222021 - 2²⁶ = 205113157 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 272221984 and 272222002.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (272222029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 136111010 + 136111011.

It is an arithmetic number, because the mean of its divisors is an integer number (136111011).

Almost surely, 2^272222021 is an apocalyptic number.

It is an amenable number.

272222021 is a deficient number, since it is larger than the sum of its proper divisors (1).

272222021 is an equidigital number, since it uses as much as digits as its factorization.

272222021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 448, while the sum is 20.

The square root of 272222021 is about 16499.1521297308. The cubic root of 272222021 is about 648.0986019811.

Adding to 272222021 its reverse (120222272), we get a palindrome (392444293).

The spelling of 272222021 in words is "two hundred seventy-two million, two hundred twenty-two thousand, twenty-one".