71002101221 has 4 divisors (see below), whose sum is σ = 71123059392. Its totient is φ = 70881143052.

The previous prime is 71002101197. The next prime is 71002101229. The reversal of 71002101221 is 12210120017.

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 a de Polignac number, because none of the positive numbers 2^k-71002101221 is a prime.

It is a super-3 number, since 3×71002101221³ (a number of 34 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 71002101221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71002101229) 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, 60478205 + ... + 60479378.

It is an arithmetic number, because the mean of its divisors is an integer number (17780764848).

Almost surely, 2^71002101221 is an apocalyptic number.

It is an amenable number.

71002101221 is a deficient number, since it is larger than the sum of its proper divisors (120958171).

71002101221 is a wasteful number, since it uses less digits than its factorization.

71002101221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120958170.

The product of its (nonzero) digits is 56, while the sum is 17.

Adding to 71002101221 its reverse (12210120017), we get a palindrome (83212221238).

The spelling of 71002101221 in words is "seventy-one billion, two million, one hundred one thousand, two hundred twenty-one".