713212121 has 8 divisors (see below), whose sum is σ = 717003144. Its totient is φ = 709430400.

The previous prime is 713212099. The next prime is 713212127. The reversal of 713212121 is 121212317.

It can be written as a sum of positive squares in 4 ways, for example, as 16516096 + 696696025 = 4064^2 + 26395^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 713212121 - 2⁶ = 713212057 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 713212093 and 713212102.

It is not an unprimeable number, because it can be changed into a prime (713212127) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 192341 + ... + 196013.

It is an arithmetic number, because the mean of its divisors is an integer number (89625393).

Almost surely, 2^713212121 is an apocalyptic number.

It is an amenable number.

713212121 is a deficient number, since it is larger than the sum of its proper divisors (3791023).

713212121 is a wasteful number, since it uses less digits than its factorization.

713212121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4651.

The product of its digits is 168, while the sum is 20.

The square root of 713212121 is about 26706.0315471992. The cubic root of 713212121 is about 893.4554557403.

Adding to 713212121 its reverse (121212317), we get a palindrome (834424438).

The spelling of 713212121 in words is "seven hundred thirteen million, two hundred twelve thousand, one hundred twenty-one".