7221137050031 has 2 divisors, whose sum is σ = 7221137050032. Its totient is φ = 7221137050030.

The previous prime is 7221137050013. The next prime is 7221137050111. The reversal of 7221137050031 is 1300507311227.

Together with previous prime (7221137050013) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7221137050031 is a prime.

It is a super-2 number, since 2×7221137050031² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 7221137050031.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7221127050031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3610568525015 + 3610568525016.

It is an arithmetic number, because the mean of its divisors is an integer number (3610568525016).

Almost surely, 2^{7221137050031} is an apocalyptic number.

7221137050031 is a deficient number, since it is larger than the sum of its proper divisors (1).

7221137050031 is an equidigital number, since it uses as much as digits as its factorization.

7221137050031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8820, while the sum is 32.

The spelling of 7221137050031 in words is "seven trillion, two hundred twenty-one billion, one hundred thirty-seven million, fifty thousand, thirty-one".