120100661 has 2 divisors, whose sum is σ = 120100662. Its totient is φ = 120100660.

The previous prime is 120100613. The next prime is 120100667. The reversal of 120100661 is 166001021.

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., 94284100 + 25816561 = 9710^2 + 5081^2 .

It is an emirp because it is prime and its reverse (166001021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 120100661 - 2¹⁸ = 119838517 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (120100667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60050330 + 60050331.

It is an arithmetic number, because the mean of its divisors is an integer number (60050331).

Almost surely, 2^120100661 is an apocalyptic number.

It is an amenable number.

120100661 is a deficient number, since it is larger than the sum of its proper divisors (1).

120100661 is an equidigital number, since it uses as much as digits as its factorization.

120100661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 120100661 is about 10959.0447120176. The cubic root of 120100661 is about 493.3802937502.

Adding to 120100661 its reverse (166001021), we get a palindrome (286101682).

The spelling of 120100661 in words is "one hundred twenty million, one hundred thousand, six hundred sixty-one".