1221003144124 has 12 divisors (see below), whose sum is σ = 2138997644784. Its totient is φ = 609860959904.

The previous prime is 1221003143989. The next prime is 1221003144143. The reversal of 1221003144124 is 4214413001221.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 160148752 + ... + 160156375.

It is an arithmetic number, because the mean of its divisors is an integer number (178249803732).

Almost surely, 2^{1221003144124} is an apocalyptic number.

It is an amenable number.

1221003144124 is a deficient number, since it is larger than the sum of its proper divisors (917994500660).

1221003144124 is a wasteful number, since it uses less digits than its factorization.

1221003144124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 320306084 (or 320306082 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 25.

Adding to 1221003144124 its reverse (4214413001221), we get a palindrome (5435416145345).

The spelling of 1221003144124 in words is "one trillion, two hundred twenty-one billion, three million, one hundred forty-four thousand, one hundred twenty-four".