1221032130144 has 48 divisors (see below), whose sum is σ = 3207813396480. Its totient is φ = 406680036480.

The previous prime is 1221032130137. The next prime is 1221032130299. The reversal of 1221032130144 is 4410312301221.

It is a tau number, because it is divible by the number of its divisors (48).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5047984 + ... + 5284335.

It is an arithmetic number, because the mean of its divisors is an integer number (66829445760).

Almost surely, 2^{1221032130144} is an apocalyptic number.

It is an amenable number.

1221032130144 is an abundant number, since it is smaller than the sum of its proper divisors (1986781266336).

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

1221032130144 is a wasteful number, since it uses less digits than its factorization.

1221032130144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10333563 (or 10333555 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

Adding to 1221032130144 its reverse (4410312301221), we get a palindrome (5631344431365).

The spelling of 1221032130144 in words is "one trillion, two hundred twenty-one billion, thirty-two million, one hundred thirty thousand, one hundred forty-four".