12011221230 has 64 divisors (see below), whose sum is σ = 30504066048. Its totient is φ = 3020568320.

The previous prime is 12011221223. The next prime is 12011221249. The reversal of 12011221230 is 3212211021.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a Curzon number.

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, 73599 + ... + 171578.

It is an arithmetic number, because the mean of its divisors is an integer number (476626032).

Almost surely, 2^12011221230 is an apocalyptic number.

12011221230 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12011221230 is an abundant number, since it is smaller than the sum of its proper divisors (18492844818).

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

12011221230 is a wasteful number, since it uses less digits than its factorization.

12011221230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245281.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 12011221230 its reverse (3212211021), we get a palindrome (15223432251).

The spelling of 12011221230 in words is "twelve billion, eleven million, two hundred twenty-one thousand, two hundred thirty".