221421255572269 has 2 divisors, whose sum is σ = 221421255572270. Its totient is φ = 221421255572268.

The previous prime is 221421255572093. The next prime is 221421255572273. The reversal of 221421255572269 is 962275552124122.

221421255572269 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 149964834396169 + 71456421176100 = 12246013^2 + 8453190^2 .

It is a cyclic number.

It is not a de Polignac number, because 221421255572269 - 2¹⁵ = 221421255539501 is a prime.

It is a super-2 number, since 2×221421255572269² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221421255572669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110710627786134 + 110710627786135.

It is an arithmetic number, because the mean of its divisors is an integer number (110710627786135).

Almost surely, 2^{221421255572269} is an apocalyptic number.

It is an amenable number.

221421255572269 is a deficient number, since it is larger than the sum of its proper divisors (1).

221421255572269 is an equidigital number, since it uses as much as digits as its factorization.

221421255572269 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12096000, while the sum is 55.

The spelling of 221421255572269 in words is "two hundred twenty-one trillion, four hundred twenty-one billion, two hundred fifty-five million, five hundred seventy-two thousand, two hundred sixty-nine".