1221411050144 has 48 divisors (see below), whose sum is σ = 2600275644288. Its totient is φ = 562552261632.

The previous prime is 1221411050143. The next prime is 1221411050159. The reversal of 1221411050144 is 4410501141221.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1221411050143) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23859974 + ... + 23911109.

It is an arithmetic number, because the mean of its divisors is an integer number (54172409256).

Almost surely, 2^{1221411050144} is an apocalyptic number.

It is an amenable number.

1221411050144 is an abundant number, since it is smaller than the sum of its proper divisors (1378864594144).

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

1221411050144 is a wasteful number, since it uses less digits than its factorization.

1221411050144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47771157 (or 47771149 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 26.

Adding to 1221411050144 its reverse (4410501141221), we get a palindrome (5631912191365).

The spelling of 1221411050144 in words is "one trillion, two hundred twenty-one billion, four hundred eleven million, fifty thousand, one hundred forty-four".