121223311 has 16 divisors (see below), whose sum is σ = 140948640. Its totient is φ = 103034880.

The previous prime is 121223279. The next prime is 121223351. The reversal of 121223311 is 113322121.

It is a cyclic number.

It is not a de Polignac number, because 121223311 - 2⁵ = 121223279 is a prime.

It is a super-2 number, since 2×121223311² = 29390182259605442, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121223351) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27295 + ... + 31423.

It is an arithmetic number, because the mean of its divisors is an integer number (8809290).

Almost surely, 2^121223311 is an apocalyptic number.

121223311 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

121223311 is a deficient number, since it is larger than the sum of its proper divisors (19725329).

121223311 is a wasteful number, since it uses less digits than its factorization.

121223311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4314.

The product of its digits is 72, while the sum is 16.

The square root of 121223311 is about 11010.1458210144. The cubic root of 121223311 is about 494.9128316392.

Adding to 121223311 its reverse (113322121), we get a palindrome (234545432).

The spelling of 121223311 in words is "one hundred twenty-one million, two hundred twenty-three thousand, three hundred eleven".