1221013012230 has 144 divisors (see below), whose sum is σ = 3498187990752. Its totient is φ = 295263936000.

The previous prime is 1221013012223. The next prime is 1221013012237. The reversal of 1221013012230 is 322103101221.

1221013012230 is a `hidden beast` number, since 122 + 10 + 1 + 301 + 2 + 230 = 666.

It is an interprime number because it is at equal distance from previous prime (1221013012223) and next prime (1221013012237).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221013012237) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 4227087 + ... + 4506693.

It is an arithmetic number, because the mean of its divisors is an integer number (24292972158).

Almost surely, 2^{1221013012230} is an apocalyptic number.

1221013012230 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1221013012230, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1749093995376).

1221013012230 is an abundant number, since it is smaller than the sum of its proper divisors (2277174978522).

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

1221013012230 is a wasteful number, since it uses less digits than its factorization.

1221013012230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280043 (or 280029 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 1221013012230 its reverse (322103101221), we get a palindrome (1543116113451).

The spelling of 1221013012230 in words is "one trillion, two hundred twenty-one billion, thirteen million, twelve thousand, two hundred thirty".