117701021 has 2 divisors, whose sum is σ = 117701022. Its totient is φ = 117701020.

The previous prime is 117701009. The next prime is 117701041. The reversal of 117701021 is 120107711.

It is an a-pointer prime, because the next prime (117701041) can be obtained adding 117701021 to its sum of digits (20).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63840100 + 53860921 = 7990^2 + 7339^2 .

It is an emirp because it is prime and its reverse (120107711) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 117701021 - 2¹⁸ = 117438877 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 117700984 and 117701002.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (117701041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58850510 + 58850511.

It is an arithmetic number, because the mean of its divisors is an integer number (58850511).

Almost surely, 2^117701021 is an apocalyptic number.

It is an amenable number.

117701021 is a deficient number, since it is larger than the sum of its proper divisors (1).

117701021 is an equidigital number, since it uses as much as digits as its factorization.

117701021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 98, while the sum is 20.

The square root of 117701021 is about 10849.0101391786. The cubic root of 117701021 is about 490.0722106546.

Adding to 117701021 its reverse (120107711), we get a palindrome (237808732).

The spelling of 117701021 in words is "one hundred seventeen million, seven hundred one thousand, twenty-one".