101451451991 has 2 divisors, whose sum is σ = 101451451992. Its totient is φ = 101451451990.

The previous prime is 101451451931. The next prime is 101451452021. The reversal of 101451451991 is 199154154101.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 101451451991 - 2¹⁴ = 101451435607 is a prime.

It is a super-2 number, since 2×101451451991² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (101451451931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50725725995 + 50725725996.

It is an arithmetic number, because the mean of its divisors is an integer number (50725725996).

Almost surely, 2^101451451991 is an apocalyptic number.

101451451991 is a deficient number, since it is larger than the sum of its proper divisors (1).

101451451991 is an equidigital number, since it uses as much as digits as its factorization.

101451451991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32400, while the sum is 41.

The spelling of 101451451991 in words is "one hundred one billion, four hundred fifty-one million, four hundred fifty-one thousand, nine hundred ninety-one".