7310111122121 has 4 divisors (see below), whose sum is σ = 7310298980244. Its totient is φ = 7309923264000.

The previous prime is 7310111122063. The next prime is 7310111122147. The reversal of 7310111122121 is 1212211110137.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2897947856896 + 4412163265225 = 1702336^2 + 2100515^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7310111122121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7310111122151) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 93870680 + ... + 93948521.

It is an arithmetic number, because the mean of its divisors is an integer number (1827574745061).

Almost surely, 2^{7310111122121} is an apocalyptic number.

It is an amenable number.

7310111122121 is a deficient number, since it is larger than the sum of its proper divisors (187858123).

7310111122121 is a wasteful number, since it uses less digits than its factorization.

7310111122121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187858122.

The product of its (nonzero) digits is 168, while the sum is 23.

Adding to 7310111122121 its reverse (1212211110137), we get a palindrome (8522322232258).

The spelling of 7310111122121 in words is "seven trillion, three hundred ten billion, one hundred eleven million, one hundred twenty-two thousand, one hundred twenty-one".