121212201 has 32 divisors (see below), whose sum is σ = 185942016. Its totient is φ = 69552000.

The previous prime is 121212181. The next prime is 121212209. The reversal of 121212201 is 102212121.

It is not a de Polignac number, because 121212201 - 2¹⁸ = 120950057 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121212209) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 46821 + ... + 49341.

It is an arithmetic number, because the mean of its divisors is an integer number (5810688).

Almost surely, 2^121212201 is an apocalyptic number.

121212201 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

121212201 is a deficient number, since it is larger than the sum of its proper divisors (64729815).

121212201 is a wasteful number, since it uses less digits than its factorization.

121212201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2613.

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 121212201 is about 11009.6412748100. The cubic root of 121212201 is about 494.8977117487.

Adding to 121212201 its reverse (102212121), we get a palindrome (223424322).

The spelling of 121212201 in words is "one hundred twenty-one million, two hundred twelve thousand, two hundred one".