7121431667011 has 4 divisors (see below), whose sum is σ = 7121442296872. Its totient is φ = 7121421037152.

The previous prime is 7121431666903. The next prime is 7121431667089. The reversal of 7121431667011 is 1107661341217.

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

It is a cyclic number.

It is not a de Polignac number, because 7121431667011 - 2¹³ = 7121431658819 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7121431667111) 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, 4237161 + ... + 5674186.

It is an arithmetic number, because the mean of its divisors is an integer number (1780360574218).

Almost surely, 2^{7121431667011} is an apocalyptic number.

7121431667011 is a deficient number, since it is larger than the sum of its proper divisors (10629861).

7121431667011 is an equidigital number, since it uses as much as digits as its factorization.

7121431667011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10629860.

The product of its (nonzero) digits is 42336, while the sum is 40.

The spelling of 7121431667011 in words is "seven trillion, one hundred twenty-one billion, four hundred thirty-one million, six hundred sixty-seven thousand, eleven".