71112070621 has 4 divisors (see below), whose sum is σ = 74854811200. Its totient is φ = 67369330044.

The previous prime is 71112070597. The next prime is 71112070649. The reversal of 71112070621 is 12607021117.

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 71112070621 - 2¹³ = 71112062429 is a prime.

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 71112070621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71112070691) 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, 1871370261 + ... + 1871370298.

It is an arithmetic number, because the mean of its divisors is an integer number (18713702800).

Almost surely, 2^71112070621 is an apocalyptic number.

It is an amenable number.

71112070621 is a deficient number, since it is larger than the sum of its proper divisors (3742740579).

71112070621 is a wasteful number, since it uses less digits than its factorization.

71112070621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3742740578.

The product of its (nonzero) digits is 1176, while the sum is 28.

Adding to 71112070621 its reverse (12607021117), we get a palindrome (83719091738).

The spelling of 71112070621 in words is "seventy-one billion, one hundred twelve million, seventy thousand, six hundred twenty-one".