71100212020121 has 4 divisors (see below), whose sum is σ = 72000214704000. Its totient is φ = 70200209336244.

The previous prime is 71100212020081. The next prime is 71100212020141. The reversal of 71100212020121 is 12102021200117.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 71100212020121 - 2²² = 71100207825817 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 71100212020093 and 71100212020102.

It is not an unprimeable number, because it can be changed into a prime (71100212020141) 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, 450001341821 + ... + 450001341978.

It is an arithmetic number, because the mean of its divisors is an integer number (18000053676000).

Almost surely, 2^{71100212020121} is an apocalyptic number.

It is an amenable number.

71100212020121 is a deficient number, since it is larger than the sum of its proper divisors (900002683879).

71100212020121 is an equidigital number, since it uses as much as digits as its factorization.

71100212020121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 900002683878.

The product of its (nonzero) digits is 112, while the sum is 20.

Adding to 71100212020121 its reverse (12102021200117), we get a palindrome (83202233220238).

The spelling of 71100212020121 in words is "seventy-one trillion, one hundred billion, two hundred twelve million, twenty thousand, one hundred twenty-one".