1220440133 has 4 divisors (see below), whose sum is σ = 1331389248. Its totient is φ = 1109491020.

The previous prime is 1220440127. The next prime is 1220440139. The reversal of 1220440133 is 3310440221.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (1220440127) and next prime (1220440139).

It is not a de Polignac number, because 1220440133 - 2⁶ = 1220440069 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220440139) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55474541 + ... + 55474562.

It is an arithmetic number, because the mean of its divisors is an integer number (332847312).

Almost surely, 2^1220440133 is an apocalyptic number.

It is an amenable number.

1220440133 is a deficient number, since it is larger than the sum of its proper divisors (110949115).

1220440133 is a wasteful number, since it uses less digits than its factorization.

1220440133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110949114.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 1220440133 is about 34934.7983105671. The cubic root of 1220440133 is about 1068.6582106548.

Adding to 1220440133 its reverse (3310440221), we get a palindrome (4530880354).

The spelling of 1220440133 in words is "one billion, two hundred twenty million, four hundred forty thousand, one hundred thirty-three".