1221200000248 has 32 divisors (see below), whose sum is σ = 2299540104000. Its totient is φ = 607989773440.

The previous prime is 1221200000203. The next prime is 1221200000249. The reversal of 1221200000248 is 8420000021221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221200000249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28025358 + ... + 28068898.

It is an arithmetic number, because the mean of its divisors is an integer number (71860628250).

Almost surely, 2^{1221200000248} is an apocalyptic number.

It is an amenable number.

1221200000248 is a deficient number, since it is larger than the sum of its proper divisors (1078340103752).

1221200000248 is a wasteful number, since it uses less digits than its factorization.

1221200000248 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58455 (or 58451 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 22.

Adding to 1221200000248 its reverse (8420000021221), we get a palindrome (9641200021469).

The spelling of 1221200000248 in words is "one trillion, two hundred twenty-one billion, two hundred million, two hundred forty-eight", and thus it is an aban number.