1220012123424 has 96 divisors (see below), whose sum is σ = 3248172555264. Its totient is φ = 400876949760.

The previous prime is 1220012123423. The next prime is 1220012123431. The reversal of 1220012123424 is 4243212100221.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a junction number, because it is equal to n+sod(n) for n = 1220012123394 and 1220012123403.

It is not an unprimeable number, because it can be changed into a prime (1220012123423) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 58354957 + ... + 58375859.

It is an arithmetic number, because the mean of its divisors is an integer number (33835130784).

Almost surely, 2^{1220012123424} 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 1220012123424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1624086277632).

1220012123424 is an abundant number, since it is smaller than the sum of its proper divisors (2028160431840).

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

1220012123424 is a wasteful number, since it uses less digits than its factorization.

1220012123424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29550 (or 29542 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 24.

Adding to 1220012123424 its reverse (4243212100221), we get a palindrome (5463224223645).

The spelling of 1220012123424 in words is "one trillion, two hundred twenty billion, twelve million, one hundred twenty-three thousand, four hundred twenty-four".