101220481 has 2 divisors, whose sum is σ = 101220482. Its totient is φ = 101220480.

The previous prime is 101220479. The next prime is 101220491. The reversal of 101220481 is 184022101.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 100180081 + 1040400 = 10009^2 + 1020^2 .

It is a cyclic number.

It is not a de Polignac number, because 101220481 - 2¹ = 101220479 is a prime.

It is a super-2 number, since 2×101220481² = 20491171547742722, which contains 22 as substring.

Together with 101220479, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (101220421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50610240 + 50610241.

It is an arithmetic number, because the mean of its divisors is an integer number (50610241).

Almost surely, 2^101220481 is an apocalyptic number.

It is an amenable number.

101220481 is a deficient number, since it is larger than the sum of its proper divisors (1).

101220481 is an equidigital number, since it uses as much as digits as its factorization.

101220481 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 128, while the sum is 19.

The square root of 101220481 is about 10060.8389809200. The cubic root of 101220481 is about 466.0395764800.

Adding to 101220481 its reverse (184022101), we get a palindrome (285242582).

The spelling of 101220481 in words is "one hundred one million, two hundred twenty thousand, four hundred eighty-one".