121636101 has 4 divisors (see below), whose sum is σ = 162181472. Its totient is φ = 81090732.

The previous prime is 121636091. The next prime is 121636103. The reversal of 121636101 is 101636121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 121636101 - 2⁵ = 121636069 is a prime.

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

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121636103) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20272681 + ... + 20272686.

It is an arithmetic number, because the mean of its divisors is an integer number (40545368).

Almost surely, 2^121636101 is an apocalyptic number.

It is an amenable number.

121636101 is a deficient number, since it is larger than the sum of its proper divisors (40545371).

121636101 is an equidigital number, since it uses as much as digits as its factorization.

121636101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40545370.

The product of its (nonzero) digits is 216, while the sum is 21.

The square root of 121636101 is about 11028.8757813297. The cubic root of 121636101 is about 495.4739547846.

The spelling of 121636101 in words is "one hundred twenty-one million, six hundred thirty-six thousand, one hundred one".