1220233311 has 24 divisors (see below), whose sum is σ = 1927201536. Its totient is φ = 737839440.

The previous prime is 1220233303. The next prime is 1220233337. The reversal of 1220233311 is 1133320221.

1220233311 is a `hidden beast` number, since 122 + 0 + 233 + 311 = 666.

1220233311 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1220233311 - 2³ = 1220233303 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220233111) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 29946 + ... + 57768.

It is an arithmetic number, because the mean of its divisors is an integer number (80300064).

Almost surely, 2^1220233311 is an apocalyptic number.

1220233311 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1220233311 is a deficient number, since it is larger than the sum of its proper divisors (706968225).

1220233311 is a wasteful number, since it uses less digits than its factorization.

1220233311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28283 (or 28280 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 1220233311 is about 34931.8380707343. The cubic root of 1220233311 is about 1068.5978404903.

Adding to 1220233311 its reverse (1133320221), we get a palindrome (2353553532).

The spelling of 1220233311 in words is "one billion, two hundred twenty million, two hundred thirty-three thousand, three hundred eleven".