221042034061 has 2 divisors, whose sum is σ = 221042034062. Its totient is φ = 221042034060.

The previous prime is 221042034019. The next prime is 221042034089. The reversal of 221042034061 is 160430240122.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 181982440836 + 39059593225 = 426594^2 + 197635^2 .

It is a cyclic number.

It is not a de Polignac number, because 221042034061 - 2¹⁷ = 221041902989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221042074061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110521017030 + 110521017031.

It is an arithmetic number, because the mean of its divisors is an integer number (110521017031).

Almost surely, 2^221042034061 is an apocalyptic number.

It is an amenable number.

221042034061 is a deficient number, since it is larger than the sum of its proper divisors (1).

221042034061 is an equidigital number, since it uses as much as digits as its factorization.

221042034061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 221042034061 its reverse (160430240122), we get a palindrome (381472274183).

The spelling of 221042034061 in words is "two hundred twenty-one billion, forty-two million, thirty-four thousand, sixty-one".