1220402131124 has 24 divisors (see below), whose sum is σ = 2329887617568. Its totient is φ = 554721335840.

The previous prime is 1220402131099. The next prime is 1220402131141. The reversal of 1220402131124 is 4211312040221.

It is a self number, because there is not a number n which added to its sum of digits gives 1220402131124.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5486114 + ... + 5704230.

It is an arithmetic number, because the mean of its divisors is an integer number (97078650732).

Almost surely, 2^{1220402131124} is an apocalyptic number.

It is an amenable number.

1220402131124 is a deficient number, since it is larger than the sum of its proper divisors (1109485486444).

1220402131124 is a wasteful number, since it uses less digits than its factorization.

1220402131124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 345295 (or 345293 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 23.

Adding to 1220402131124 its reverse (4211312040221), we get a palindrome (5431714171345).

The spelling of 1220402131124 in words is "one trillion, two hundred twenty billion, four hundred two million, one hundred thirty-one thousand, one hundred twenty-four".