11455222123220 has 12 divisors (see below), whose sum is σ = 24055966458804. Its totient is φ = 4582088849280.

The previous prime is 11455222123201. The next prime is 11455222123229. The reversal of 11455222123220 is 2232122255411.

It can be written as a sum of positive squares in 2 ways, for example, as 7940752028356 + 3514470094864 = 2817934^2 + 1874692^2 .

It is a super-2 number, since 2×11455222123220² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11455222123229) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 286380553061 + ... + 286380553100.

It is an arithmetic number, because the mean of its divisors is an integer number (2004663871567).

Almost surely, 2^{11455222123220} is an apocalyptic number.

11455222123220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11455222123220 is an abundant number, since it is smaller than the sum of its proper divisors (12600744335584).

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

11455222123220 is a wasteful number, since it uses less digits than its factorization.

11455222123220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 572761106170 (or 572761106168 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 32.

Adding to 11455222123220 its reverse (2232122255411), we get a palindrome (13687344378631).

The spelling of 11455222123220 in words is "eleven trillion, four hundred fifty-five billion, two hundred twenty-two million, one hundred twenty-three thousand, two hundred twenty".