1220550100455 has 64 divisors (see below), whose sum is σ = 2245085475840. Its totient is φ = 554662262784.

The previous prime is 1220550100453. The next prime is 1220550100457. The reversal of 1220550100455 is 5540010550221.

It is an interprime number because it is at equal distance from previous prime (1220550100453) and next prime (1220550100457).

It is not a de Polignac number, because 1220550100455 - 2¹ = 1220550100453 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220550100453) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 66844687 + ... + 66862943.

It is an arithmetic number, because the mean of its divisors is an integer number (35079460560).

Almost surely, 2^{1220550100455} is an apocalyptic number.

1220550100455 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1220550100455 is a deficient number, since it is larger than the sum of its proper divisors (1024535375385).

1220550100455 is a wasteful number, since it uses less digits than its factorization.

1220550100455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22008.

The product of its (nonzero) digits is 10000, while the sum is 30.

Adding to 1220550100455 its reverse (5540010550221), we get a palindrome (6760560650676).

The spelling of 1220550100455 in words is "one trillion, two hundred twenty billion, five hundred fifty million, one hundred thousand, four hundred fifty-five".