244267451221 has 2 divisors, whose sum is σ = 244267451222. Its totient is φ = 244267451220.

The previous prime is 244267451203. The next prime is 244267451257. The reversal of 244267451221 is 122154762442.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 233955048721 + 10312402500 = 483689^2 + 101550^2 .

It is a cyclic number.

It is not a de Polignac number, because 244267451221 - 2⁷ = 244267451093 is a prime.

It is a super-2 number, since 2×244267451221² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (244267451201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122133725610 + 122133725611.

It is an arithmetic number, because the mean of its divisors is an integer number (122133725611).

Almost surely, 2^244267451221 is an apocalyptic number.

It is an amenable number.

244267451221 is a deficient number, since it is larger than the sum of its proper divisors (1).

244267451221 is an equidigital number, since it uses as much as digits as its factorization.

244267451221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 215040, while the sum is 40.

The spelling of 244267451221 in words is "two hundred forty-four billion, two hundred sixty-seven million, four hundred fifty-one thousand, two hundred twenty-one".