121633213 has 8 divisors (see below), whose sum is σ = 132215328. Its totient is φ = 111226224.

The previous prime is 121633159. The next prime is 121633229. The reversal of 121633213 is 312336121.

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 121633213 - 2⁹ = 121632701 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121633273) 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, 42331 + ... + 45112.

It is an arithmetic number, because the mean of its divisors is an integer number (16526916).

Almost surely, 2^121633213 is an apocalyptic number.

121633213 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

121633213 is a deficient number, since it is larger than the sum of its proper divisors (10582115).

121633213 is a wasteful number, since it uses less digits than its factorization.

121633213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87563.

The product of its digits is 648, while the sum is 22.

The square root of 121633213 is about 11028.7448515232. The cubic root of 121633213 is about 495.4700334156.

Adding to 121633213 its reverse (312336121), we get a palindrome (433969334).

It can be divided in two parts, 12163 and 3213, that added together give a square (15376 = 124²).

The spelling of 121633213 in words is "one hundred twenty-one million, six hundred thirty-three thousand, two hundred thirteen".