7126212131 has 4 divisors (see below), whose sum is σ = 7126701264. Its totient is φ = 7125723000.

The previous prime is 7126212113. The next prime is 7126212151. The reversal of 7126212131 is 1312126217.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7126212131 is a prime.

It is a super-2 number, since 2×7126212131² (a number of 21 digits) contains 22 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 7126212131.

It is not an unprimeable number, because it can be changed into a prime (7126212151) 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, 222020 + ... + 252081.

It is an arithmetic number, because the mean of its divisors is an integer number (1781675316).

Almost surely, 2^7126212131 is an apocalyptic number.

7126212131 is a deficient number, since it is larger than the sum of its proper divisors (489133).

7126212131 is a wasteful number, since it uses less digits than its factorization.

7126212131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 489132.

The product of its digits is 1008, while the sum is 26.

The square root of 7126212131 is about 84416.8948196983. The cubic root of 7126212131 is about 1924.3596796270.

Adding to 7126212131 its reverse (1312126217), we get a palindrome (8438338348).

The spelling of 7126212131 in words is "seven billion, one hundred twenty-six million, two hundred twelve thousand, one hundred thirty-one".