1220453121 has 8 divisors (see below), whose sum is σ = 1638048064. Its totient is φ = 808246800.

The previous prime is 1220453099. The next prime is 1220453131. The reversal of 1220453121 is 1213540221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1220453121 - 2⁶ = 1220453057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1220453131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1346626 + ... + 1347531.

It is an arithmetic number, because the mean of its divisors is an integer number (204756008).

Almost surely, 2^1220453121 is an apocalyptic number.

It is an amenable number.

1220453121 is a deficient number, since it is larger than the sum of its proper divisors (417594943).

1220453121 is a wasteful number, since it uses less digits than its factorization.

1220453121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2694311.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 1220453121 is about 34934.9841992236. The cubic root of 1220453121 is about 1068.6620015505.

Adding to 1220453121 its reverse (1213540221), we get a palindrome (2433993342).

The spelling of 1220453121 in words is "one billion, two hundred twenty million, four hundred fifty-three thousand, one hundred twenty-one".