10191472149421 has 2 divisors, whose sum is σ = 10191472149422. Its totient is φ = 10191472149420.

The previous prime is 10191472149401. The next prime is 10191472149541. The reversal of 10191472149421 is 12494127419101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9671322515625 + 520149633796 = 3109875^2 + 721214^2 .

It is a cyclic number.

It is not a de Polignac number, because 10191472149421 - 2⁹ = 10191472148909 is a prime.

It is a super-2 number, since 2×10191472149421² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10191472149401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5095736074710 + 5095736074711.

It is an arithmetic number, because the mean of its divisors is an integer number (5095736074711).

Almost surely, 2^{10191472149421} is an apocalyptic number.

It is an amenable number.

10191472149421 is a deficient number, since it is larger than the sum of its proper divisors (1).

10191472149421 is an equidigital number, since it uses as much as digits as its factorization.

10191472149421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 145152, while the sum is 46.

The spelling of 10191472149421 in words is "ten trillion, one hundred ninety-one billion, four hundred seventy-two million, one hundred forty-nine thousand, four hundred twenty-one".