1221130302 has 64 divisors (see below), whose sum is σ = 2829066240. Its totient is φ = 344183904.

The previous prime is 1221130291. The next prime is 1221130321. The reversal of 1221130302 is 2030311221.

It is a super-2 number, since 2×1221130302² = 2982318428925222408, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1898793 + ... + 1899435.

It is an arithmetic number, because the mean of its divisors is an integer number (44204160).

Almost surely, 2^1221130302 is an apocalyptic number.

1221130302 is an abundant number, since it is smaller than the sum of its proper divisors (1607935938).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1221130302 is a wasteful number, since it uses less digits than its factorization.

1221130302 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1197.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 1221130302 is about 34944.6748732908. The cubic root of 1221130302 is about 1068.8596177159.

Adding to 1221130302 its reverse (2030311221), we get a palindrome (3251441523).

The spelling of 1221130302 in words is "one billion, two hundred twenty-one million, one hundred thirty thousand, three hundred two".