101212099 has 4 divisors (see below), whose sum is σ = 101726064. Its totient is φ = 100698136.

The previous prime is 101212087. The next prime is 101212127. The reversal of 101212099 is 990212101.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 990212101 = 131 ⋅7558871.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-101212099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (101212019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 256687 + ... + 257080.

It is an arithmetic number, because the mean of its divisors is an integer number (25431516).

Almost surely, 2^101212099 is an apocalyptic number.

101212099 is a deficient number, since it is larger than the sum of its proper divisors (513965).

101212099 is an equidigital number, since it uses as much as digits as its factorization.

101212099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 513964.

The product of its (nonzero) digits is 324, while the sum is 25.

The square root of 101212099 is about 10060.4224066388. The cubic root of 101212099 is about 466.0267119835.

The spelling of 101212099 in words is "one hundred one million, two hundred twelve thousand, ninety-nine".