801220061 has 2 divisors, whose sum is σ = 801220062. Its totient is φ = 801220060.

The previous prime is 801220037. The next prime is 801220099. The reversal of 801220061 is 160022108.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 425596900 + 375623161 = 20630^2 + 19381^2 .

It is a cyclic number.

It is not a de Polignac number, because 801220061 - 2²⁶ = 734111197 is a prime.

It is a super-2 number, since 2×801220061² = 1283907172297687442, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (801220001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 400610030 + 400610031.

It is an arithmetic number, because the mean of its divisors is an integer number (400610031).

Almost surely, 2^801220061 is an apocalyptic number.

It is an amenable number.

801220061 is a deficient number, since it is larger than the sum of its proper divisors (1).

801220061 is an equidigital number, since it uses as much as digits as its factorization.

801220061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 20.

The square root of 801220061 is about 28305.8308657421. The cubic root of 801220061 is about 928.7894454812.

Adding to 801220061 its reverse (160022108), we get a palindrome (961242169).

The spelling of 801220061 in words is "eight hundred one million, two hundred twenty thousand, sixty-one".