121213331 has 6 divisors (see below), whose sum is σ = 127929132. Its totient is φ = 114833340.

The previous prime is 121213321. The next prime is 121213333. The reversal of 121213331 is 133312121.

It is not a de Polignac number, because 121213331 - 2¹⁴ = 121196947 is a prime.

It is a super-2 number, since 2×121213331² = 29385343224231122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121213333) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 167525 + ... + 168246.

It is an arithmetic number, because the mean of its divisors is an integer number (21321522).

Almost surely, 2^121213331 is an apocalyptic number.

121213331 is a deficient number, since it is larger than the sum of its proper divisors (6715801).

121213331 is an equidigital number, since it uses as much as digits as its factorization.

121213331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 335809 (or 335790 counting only the distinct ones).

The product of its digits is 108, while the sum is 17.

The square root of 121213331 is about 11009.6925933470. The cubic root of 121213331 is about 494.8992496376.

Adding to 121213331 its reverse (133312121), we get a palindrome (254525452).

The spelling of 121213331 in words is "one hundred twenty-one million, two hundred thirteen thousand, three hundred thirty-one".