101991014 has 4 divisors (see below), whose sum is σ = 152986524. Its totient is φ = 50995506.

The previous prime is 101990983. The next prime is 101991017. The reversal of 101991014 is 410199101.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 410199101 = 13 ⋅31553777.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101991017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25497752 + ... + 25497755.

It is an arithmetic number, because the mean of its divisors is an integer number (38246631).

Almost surely, 2^101991014 is an apocalyptic number.

101991014 is a deficient number, since it is larger than the sum of its proper divisors (50995510).

101991014 is an equidigital number, since it uses as much as digits as its factorization.

101991014 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50995509.

The product of its (nonzero) digits is 324, while the sum is 26.

The square root of 101991014 is about 10099.0600552725. The cubic root of 101991014 is about 467.2191516659.

The spelling of 101991014 in words is "one hundred one million, nine hundred ninety-one thousand, fourteen".