1221051021484 has 48 divisors (see below), whose sum is σ = 2590257035520. Its totient is φ = 491980582080.

The previous prime is 1221051021467. The next prime is 1221051021493. The reversal of 1221051021484 is 4841201501221.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8690647 + ... + 8830030.

It is an arithmetic number, because the mean of its divisors is an integer number (53963688240).

Almost surely, 2^{1221051021484} is an apocalyptic number.

1221051021484 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1221051021484 is an abundant number, since it is smaller than the sum of its proper divisors (1369206014036).

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

1221051021484 is a wasteful number, since it uses less digits than its factorization.

1221051021484 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17520838 (or 17520836 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 31.

The spelling of 1221051021484 in words is "one trillion, two hundred twenty-one billion, fifty-one million, twenty-one thousand, four hundred eighty-four".