101220120073 has 2 divisors, whose sum is σ = 101220120074. Its totient is φ = 101220120072.

The previous prime is 101220120059. The next prime is 101220120109. The reversal of 101220120073 is 370021022101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 70112684944 + 31107435129 = 264788^2 + 176373^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-101220120073 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 101220120073.

It is not a weakly prime, because it can be changed into another prime (101220120473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50610060036 + 50610060037.

It is an arithmetic number, because the mean of its divisors is an integer number (50610060037).

Almost surely, 2^101220120073 is an apocalyptic number.

It is an amenable number.

101220120073 is a deficient number, since it is larger than the sum of its proper divisors (1).

101220120073 is an equidigital number, since it uses as much as digits as its factorization.

101220120073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 168, while the sum is 19.

Adding to 101220120073 its reverse (370021022101), we get a palindrome (471241142174).

The spelling of 101220120073 in words is "one hundred one billion, two hundred twenty million, one hundred twenty thousand, seventy-three".