1220123133 has 48 divisors (see below), whose sum is σ = 1984993920. Its totient is φ = 717631488.

The previous prime is 1220123129. The next prime is 1220123147. The reversal of 1220123133 is 3313210221.

It is not a de Polignac number, because 1220123133 - 2² = 1220123129 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220123153) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 279816 + ... + 284142.

It is an arithmetic number, because the mean of its divisors is an integer number (41354040).

Almost surely, 2^1220123133 is an apocalyptic number.

It is an amenable number.

1220123133 is a deficient number, since it is larger than the sum of its proper divisors (764870787).

1220123133 is a wasteful number, since it uses less digits than its factorization.

1220123133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4466 (or 4463 counting only the distinct ones).

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

The square root of 1220123133 is about 34930.2609924404. The cubic root of 1220123133 is about 1068.5656773743.

Adding to 1220123133 its reverse (3313210221), we get a palindrome (4533333354).

The spelling of 1220123133 in words is "one billion, two hundred twenty million, one hundred twenty-three thousand, one hundred thirty-three".