1221125302 has 8 divisors (see below), whose sum is σ = 1848806856. Its totient is φ = 604856352.

The previous prime is 1221125293. The next prime is 1221125303. The reversal of 1221125302 is 2035211221.

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

It is a super-2 number, since 2×1221125302² = 2982294006369182408, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1221125302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221125303) 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, 2852883 + ... + 2853310.

It is an arithmetic number, because the mean of its divisors is an integer number (231100857).

Almost surely, 2^1221125302 is an apocalyptic number.

1221125302 is a deficient number, since it is larger than the sum of its proper divisors (627681554).

1221125302 is a wasteful number, since it uses less digits than its factorization.

1221125302 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5706302.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 1221125302 is about 34944.6033315589. The cubic root of 1221125302 is about 1068.8581588747.

Adding to 1221125302 its reverse (2035211221), we get a palindrome (3256336523).

The spelling of 1221125302 in words is "one billion, two hundred twenty-one million, one hundred twenty-five thousand, three hundred two".