1221463230512 has 320 divisors, whose sum is σ = 2941011763200. Its totient is φ = 479907348480.

The previous prime is 1221463230511. The next prime is 1221463230553. The reversal of 1221463230512 is 2150323641221.

It is a super-2 number, since 2×1221463230512² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1221463230511) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3222857939 + ... + 3222858317.

It is an arithmetic number, because the mean of its divisors is an integer number (9190661760).

Almost surely, 2^{1221463230512} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1221463230512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1470505881600).

1221463230512 is an abundant number, since it is smaller than the sum of its proper divisors (1719548532688).

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

1221463230512 is a wasteful number, since it uses less digits than its factorization.

1221463230512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 824 (or 818 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 32.

Adding to 1221463230512 its reverse (2150323641221), we get a palindrome (3371786871733).

The spelling of 1221463230512 in words is "one trillion, two hundred twenty-one billion, four hundred sixty-three million, two hundred thirty thousand, five hundred twelve".