275190861221 has 2 divisors, whose sum is σ = 275190861222. Its totient is φ = 275190861220.

The previous prime is 275190861157. The next prime is 275190861271. The reversal of 275190861221 is 122168091572.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 177990328321 + 97200532900 = 421889^2 + 311770^2 .

It is a cyclic number.

It is not a de Polignac number, because 275190861221 - 2⁶ = 275190861157 is a prime.

It is a super-2 number, since 2×275190861221² (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 (275190861271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 137595430610 + 137595430611.

It is an arithmetic number, because the mean of its divisors is an integer number (137595430611).

Almost surely, 2^275190861221 is an apocalyptic number.

It is an amenable number.

275190861221 is a deficient number, since it is larger than the sum of its proper divisors (1).

275190861221 is an equidigital number, since it uses as much as digits as its factorization.

275190861221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 120960, while the sum is 44.

The spelling of 275190861221 in words is "two hundred seventy-five billion, one hundred ninety million, eight hundred sixty-one thousand, two hundred twenty-one".