1220554051321 has 8 divisors (see below), whose sum is σ = 1367500362624. Its totient is φ = 1079605548720.

The previous prime is 1220554051313. The next prime is 1220554051333. The reversal of 1220554051321 is 1231504550221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1220554051321 - 2³ = 1220554051313 is a prime.

It is a super-2 number, since 2×1220554051321² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1220554051391) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1499451745 + ... + 1499452558.

It is an arithmetic number, because the mean of its divisors is an integer number (170937545328).

Almost surely, 2^{1220554051321} is an apocalyptic number.

1220554051321 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1220554051321 is a deficient number, since it is larger than the sum of its proper divisors (146946311303).

1220554051321 is a wasteful number, since it uses less digits than its factorization.

1220554051321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2998904351.

The product of its (nonzero) digits is 12000, while the sum is 31.

The spelling of 1220554051321 in words is "one trillion, two hundred twenty billion, five hundred fifty-four million, fifty-one thousand, three hundred twenty-one".