101818121 has 8 divisors (see below), whose sum is σ = 104125824. Its totient is φ = 99516400.

The previous prime is 101818103. The next prime is 101818139. The reversal of 101818121 is 121818101.

It is an interprime number because it is at equal distance from previous prime (101818103) and next prime (101818139).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 101818121 - 2²² = 97623817 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (101818021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67451 + ... + 68943.

It is an arithmetic number, because the mean of its divisors is an integer number (13015728).

Almost surely, 2^101818121 is an apocalyptic number.

It is an amenable number.

101818121 is a deficient number, since it is larger than the sum of its proper divisors (2307703).

101818121 is a wasteful number, since it uses less digits than its factorization.

101818121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2991.

The product of its (nonzero) digits is 128, while the sum is 23.

The square root of 101818121 is about 10090.4965685540. The cubic root of 101818121 is about 466.9549956860.

The spelling of 101818121 in words is "one hundred one million, eight hundred eighteen thousand, one hundred twenty-one".