1220333331 has 16 divisors (see below), whose sum is σ = 1860320000. Its totient is φ = 697046688.

The previous prime is 1220333329. The next prime is 1220333339. The reversal of 1220333331 is 1333330221.

It is not a de Polignac number, because 1220333331 - 2¹ = 1220333329 is a prime.

It is a super-2 number, since 2×1220333331² = 2978426877499111122, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 1220333298 and 1220333307.

It is not an unprimeable number, because it can be changed into a prime (1220333339) 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, 47160 + ... + 68298.

It is an arithmetic number, because the mean of its divisors is an integer number (116270000).

Almost surely, 2^1220333331 is an apocalyptic number.

1220333331 is a deficient number, since it is larger than the sum of its proper divisors (639986669).

1220333331 is a wasteful number, since it uses less digits than its factorization.

1220333331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23898.

The product of its (nonzero) digits is 972, while the sum is 21.

The square root of 1220333331 is about 34933.2696866469. The cubic root of 1220333331 is about 1068.6270366107.

Adding to 1220333331 its reverse (1333330221), we get a palindrome (2553663552).

The spelling of 1220333331 in words is "one billion, two hundred twenty million, three hundred thirty-three thousand, three hundred thirty-one".