11203211121455 has 16 divisors (see below), whose sum is σ = 13449976256640. Its totient is φ = 8958487479552.

The previous prime is 11203211121449. The next prime is 11203211121481. The reversal of 11203211121455 is 55412111230211.

It is a cyclic number.

It is not a de Polignac number, because 11203211121455 - 2¹⁴ = 11203211105071 is a prime.

It is a super-2 number, since 2×11203211121455² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 262293641 + ... + 262336349.

It is an arithmetic number, because the mean of its divisors is an integer number (840623516040).

Almost surely, 2^{11203211121455} is an apocalyptic number.

11203211121455 is a deficient number, since it is larger than the sum of its proper divisors (2246765135185).

11203211121455 is a wasteful number, since it uses less digits than its factorization.

11203211121455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65378.

The product of its (nonzero) digits is 2400, while the sum is 29.

Adding to 11203211121455 its reverse (55412111230211), we get a palindrome (66615322351666).

The spelling of 11203211121455 in words is "eleven trillion, two hundred three billion, two hundred eleven million, one hundred twenty-one thousand, four hundred fifty-five".