71102202121 has 4 divisors (see below), whose sum is σ = 71835214612. Its totient is φ = 70369189632.

The previous prime is 71102202103. The next prime is 71102202151. The reversal of 71102202121 is 12120220117.

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 28203507721 + 42898694400 = 167939^2 + 207120^2 .

It is a cyclic number.

It is not a de Polignac number, because 71102202121 - 2¹⁵ = 71102169353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71102202151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 366506100 + ... + 366506293.

It is an arithmetic number, because the mean of its divisors is an integer number (17958803653).

Almost surely, 2^71102202121 is an apocalyptic number.

It is an amenable number.

71102202121 is a deficient number, since it is larger than the sum of its proper divisors (733012491).

71102202121 is an equidigital number, since it uses as much as digits as its factorization.

71102202121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 733012490.

The product of its (nonzero) digits is 112, while the sum is 19.

Adding to 71102202121 its reverse (12120220117), we get a palindrome (83222422238).

The spelling of 71102202121 in words is "seventy-one billion, one hundred two million, two hundred two thousand, one hundred twenty-one".