1221405624054 has 96 divisors (see below), whose sum is σ = 3301679646720. Its totient is φ = 317027232000.

The previous prime is 1221405623783. The next prime is 1221405624059. The reversal of 1221405624054 is 4504265041221.

1221405624054 is a `hidden beast` number, since 1 + 2 + 2 + 1 + 4 + 0 + 562 + 40 + 54 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221405624059) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1688254 + ... + 2300654.

It is an arithmetic number, because the mean of its divisors is an integer number (34392496320).

Almost surely, 2^{1221405624054} is an apocalyptic number.

1221405624054 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1221405624054, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1650839823360).

1221405624054 is an abundant number, since it is smaller than the sum of its proper divisors (2080274022666).

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

1221405624054 is a wasteful number, since it uses less digits than its factorization.

1221405624054 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 613866 (or 613863 counting only the distinct ones).

The product of its (nonzero) digits is 76800, while the sum is 36.

The spelling of 1221405624054 in words is "one trillion, two hundred twenty-one billion, four hundred five million, six hundred twenty-four thousand, fifty-four".