221074101377 has 2 divisors, whose sum is σ = 221074101378. Its totient is φ = 221074101376.

The previous prime is 221074101371. The next prime is 221074101407. The reversal of 221074101377 is 773101470122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 142337180176 + 78736921201 = 377276^2 + 280601^2 .

It is a cyclic number.

It is not a de Polignac number, because 221074101377 - 2¹⁰ = 221074100353 is a prime.

It is a super-2 number, since 2×221074101377² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (221074101371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110537050688 + 110537050689.

It is an arithmetic number, because the mean of its divisors is an integer number (110537050689).

Almost surely, 2^221074101377 is an apocalyptic number.

It is an amenable number.

221074101377 is a deficient number, since it is larger than the sum of its proper divisors (1).

221074101377 is an equidigital number, since it uses as much as digits as its factorization.

221074101377 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16464, while the sum is 35.

Adding to 221074101377 its reverse (773101470122), we get a palindrome (994175571499).

The spelling of 221074101377 in words is "two hundred twenty-one billion, seventy-four million, one hundred one thousand, three hundred seventy-seven".