7810101022121 has 4 divisors (see below), whose sum is σ = 8079414850500. Its totient is φ = 7540787193744.

The previous prime is 7810101022099. The next prime is 7810101022177. The reversal of 7810101022121 is 1212201010187.

It is a happy number.

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 5951350532521 + 1858750489600 = 2439539^2 + 1363360^2 .

It is a cyclic number.

It is not a de Polignac number, because 7810101022121 - 2³⁰ = 7809027280297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7810101022021) 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, 134656914146 + ... + 134656914203.

It is an arithmetic number, because the mean of its divisors is an integer number (2019853712625).

Almost surely, 2^{7810101022121} is an apocalyptic number.

It is an amenable number.

7810101022121 is a deficient number, since it is larger than the sum of its proper divisors (269313828379).

7810101022121 is a wasteful number, since it uses less digits than its factorization.

7810101022121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 269313828378.

The product of its (nonzero) digits is 448, while the sum is 26.

The spelling of 7810101022121 in words is "seven trillion, eight hundred ten billion, one hundred one million, twenty-two thousand, one hundred twenty-one".