11051221400 has 48 divisors (see below), whose sum is σ = 26580106800. Its totient is φ = 4268055680.

The previous prime is 11051221387. The next prime is 11051221411. The reversal of 11051221400 is 412215011.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 946892 + ... + 958491.

It is an arithmetic number, because the mean of its divisors is an integer number (553752225).

Almost surely, 2^11051221400 is an apocalyptic number.

11051221400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11051221400 is an abundant number, since it is smaller than the sum of its proper divisors (15528885400).

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

11051221400 is a wasteful number, since it uses less digits than its factorization.

11051221400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1905428 (or 1905419 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 17.

Adding to 11051221400 its reverse (412215011), we get a palindrome (11463436411).

The spelling of 11051221400 in words is "eleven billion, fifty-one million, two hundred twenty-one thousand, four hundred".