1225303021 has 8 divisors (see below), whose sum is σ = 1240987104. Its totient is φ = 1209641040.

The previous prime is 1225303007. The next prime is 1225303031. The reversal of 1225303021 is 1203035221.

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

It is a cyclic number.

It is not a de Polignac number, because 1225303021 - 2⁷ = 1225302893 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1225303021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1225303031) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 125695 + ... + 135091.

It is an arithmetic number, because the mean of its divisors is an integer number (155123388).

Almost surely, 2^1225303021 is an apocalyptic number.

It is an amenable number.

1225303021 is a deficient number, since it is larger than the sum of its proper divisors (15684083).

1225303021 is an equidigital number, since it uses as much as digits as its factorization.

1225303021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11051.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 1225303021 is about 35004.3286037598. The cubic root of 1225303021 is about 1070.0756987816.

Adding to 1225303021 its reverse (1203035221), we get a palindrome (2428338242).

The spelling of 1225303021 in words is "one billion, two hundred twenty-five million, three hundred three thousand, twenty-one".