121021213 has 8 divisors (see below), whose sum is σ = 123464160. Its totient is φ = 118591440.

The previous prime is 121021211. The next prime is 121021231. The reversal of 121021213 is 312120121.

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 121021213 - 2¹ = 121021211 is a prime.

It is a super-2 number, since 2×121021213² = 29292267991982738, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121021193 and 121021202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121021211) 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, 16431 + ... + 22627.

It is an arithmetic number, because the mean of its divisors is an integer number (15433020).

Almost surely, 2^121021213 is an apocalyptic number.

It is an amenable number.

121021213 is a deficient number, since it is larger than the sum of its proper divisors (2442947).

121021213 is an equidigital number, since it uses as much as digits as its factorization.

121021213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6587.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 121021213 is about 11000.9641850158. The cubic root of 121021213 is about 494.6376465899.

Adding to 121021213 its reverse (312120121), we get a palindrome (433141334).

The spelling of 121021213 in words is "one hundred twenty-one million, twenty-one thousand, two hundred thirteen".