7121200112101 has 2 divisors, whose sum is σ = 7121200112102. Its totient is φ = 7121200112100.

The previous prime is 7121200112099. The next prime is 7121200112129. The reversal of 7121200112101 is 1012110021217.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4540521722500 + 2580678389601 = 2130850^2 + 1606449^2 .

It is a cyclic number.

It is not a de Polignac number, because 7121200112101 - 2¹ = 7121200112099 is a prime.

It is a super-2 number, since 2×7121200112101² (a number of 27 digits) contains 22 as substring.

Together with 7121200112099, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7121200113101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3560600056050 + 3560600056051.

It is an arithmetic number, because the mean of its divisors is an integer number (3560600056051).

Almost surely, 2^{7121200112101} is an apocalyptic number.

It is an amenable number.

7121200112101 is a deficient number, since it is larger than the sum of its proper divisors (1).

7121200112101 is an equidigital number, since it uses as much as digits as its factorization.

7121200112101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 56, while the sum is 19.

Adding to 7121200112101 its reverse (1012110021217), we get a palindrome (8133310133318).

The spelling of 7121200112101 in words is "seven trillion, one hundred twenty-one billion, two hundred million, one hundred twelve thousand, one hundred one".