221421255572093 has 2 divisors, whose sum is σ = 221421255572094. Its totient is φ = 221421255572092.

The previous prime is 221421255572087. The next prime is 221421255572269. The reversal of 221421255572093 is 390275552124122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 185045363447044 + 36375892125049 = 13603138^2 + 6031243^2 .

It is a cyclic number.

It is not a de Polignac number, because 221421255572093 - 2¹² = 221421255567997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221421255572053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110710627786046 + 110710627786047.

It is an arithmetic number, because the mean of its divisors is an integer number (110710627786047).

Almost surely, 2^{221421255572093} is an apocalyptic number.

It is an amenable number.

221421255572093 is a deficient number, since it is larger than the sum of its proper divisors (1).

221421255572093 is an equidigital number, since it uses as much as digits as its factorization.

221421255572093 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3024000, while the sum is 50.

The spelling of 221421255572093 in words is "two hundred twenty-one trillion, four hundred twenty-one billion, two hundred fifty-five million, five hundred seventy-two thousand, ninety-three".