121020073 has 2 divisors, whose sum is σ = 121020074. Its totient is φ = 121020072.

The previous prime is 121020061. The next prime is 121020091. The reversal of 121020073 is 370020121.

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., 67026969 + 53993104 = 8187^2 + 7348^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121020073 is a prime.

It is not a weakly prime, because it can be changed into another prime (121020173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60510036 + 60510037.

It is an arithmetic number, because the mean of its divisors is an integer number (60510037).

Almost surely, 2^121020073 is an apocalyptic number.

It is an amenable number.

121020073 is a deficient number, since it is larger than the sum of its proper divisors (1).

121020073 is an equidigital number, since it uses as much as digits as its factorization.

121020073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 84, while the sum is 16.

The square root of 121020073 is about 11000.9123712536. The cubic root of 121020073 is about 494.6360934498.

Adding to 121020073 its reverse (370020121), we get a palindrome (491040194).

The spelling of 121020073 in words is "one hundred twenty-one million, twenty thousand, seventy-three".