431201121102091 has 2 divisors, whose sum is σ = 431201121102092. Its totient is φ = 431201121102090.

The previous prime is 431201121102077. The next prime is 431201121102119. The reversal of 431201121102091 is 190201121102134.

It is an a-pointer prime, because the next prime (431201121102119) can be obtained adding 431201121102091 to its sum of digits (28).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 431201121102091 - 2⁹ = 431201121101579 is a prime.

It is not a weakly prime, because it can be changed into another prime (431201121102391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 215600560551045 + 215600560551046.

It is an arithmetic number, because the mean of its divisors is an integer number (215600560551046).

Almost surely, 2^{431201121102091} is an apocalyptic number.

431201121102091 is a deficient number, since it is larger than the sum of its proper divisors (1).

431201121102091 is an equidigital number, since it uses as much as digits as its factorization.

431201121102091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 28.

The spelling of 431201121102091 in words is "four hundred thirty-one trillion, two hundred one billion, one hundred twenty-one million, one hundred two thousand, ninety-one".